Sci-Fi Mystery Book Recommendations

📚The Mountain In The Sea by Ray Nayler

A fun science fiction mystery under the sea. A company is studying the octopuses and discover their way of life under the sea on a sealed off island. But more mysteries arise as the study continues.

✨This was a fun read for me that I recommended if you like mystery, marine life, under sea life, scientific exploration and explainations.

#books #bookrecommendations #scifibooks #fyp #lemon8books

2025/7/12 Edited to

... Read moreIf you're a fan of thrillers set against the backdrop of the ocean, 'The Mountain In The Sea' by Ray Nayler is a must-read. This gripping novel delves into the lives of octopuses on a secluded island, presenting a unique blend of mystery and marine biology. The story's central theme revolves around a research company investigating the intelligence and behavior of these fascinating creatures. As they allude to deeper mysteries, the book masterfully combines elements of science fiction with natural science. Ray Nayler's narrative brilliantly unravels the complexities of underwater life and encourages readers to ponder the undiscovered features of marine environments. These elements make the book appealing not only to sci-fi enthusiasts but also to anyone interested in marine ecology and exploration. The author's vivid descriptions and intricate storytelling provide a captivating reading experience that will leave readers yearning for more. In addition to the primary plot, the book touches on themes like environmental conservation and the ethical dilemmas of scientific exploration. Nayler prompts readers to consider the implications of human intervention in natural habitats, making this novel both entertaining and thought-provoking. If you're looking for more recommendations in this genre, consider exploring books that intertwine mystery with elements of nature and science, as they often provide a rich reading experience that deepens your understanding of the world around you.

Related posts

A window looking out onto a forest path, with an open book and a lamp on the windowsill. Red text overlays the image, stating 'THRILLERS THAT KEPT ME GUESSING UNTIL THE END'.
The book cover for 'The Sun Down Motel' by Simone St. James, set against a dark foliage background. Surrounding text highlights themes: 'PAST & PRESENT', 'ATMOSPHERIC SUSPENSE', 'LOCALS WITH SECRETS', and 'VINTAGE MOTEL'.
The book cover for 'Never Lie' by Freida McFadden, featuring a black couch, against a dark foliage background. Keywords like 'REMOTE MANOR', 'MISSING PERSON POV', 'WEB OF LIES', and 'COUPLES SECRETS' are displayed.
THRILLER 🔪 Book Recommendations 📚 Part I
Here are five thriller books that kept me guessing until the end. 📖 Each book follows its own set of tropes to provide a variety. 🌜Have you read any? 🌛 #thrillerbooks #Lemon8 #lemon8book #lemon8bookclub #booktok #bookaesthetic #mystery #reading #lemon8bookclubchallenge
DeLaney 🌞

DeLaney 🌞

5551 likes

Book series recommendations 📚
Sometimes I just want to read a quick series that doesn’t have a ton of books to invest in so here are some of my top picks ✨ plus all of these series are complete except the last one! 💭 What book series are you excited to read this year? #bookseries #bookrecommendations #books #book
sarahsbooks

sarahsbooks

630 likes

A stack of books on a white blanket, adorned with knitted pumpkins, a small pumpkin, and fall leaves. Text overlays read 'The ultimate FALL book guide' and list categories like Romance, Cozy fantasy, Cozy mystery, Witches, Vampires, Dark academia, Gothic, Dark romance, and Thriller.
A grid of 12 book covers under the heading 'Romance p1.' The covers feature various fall-themed romantic stories, including titles like 'The Cinnamon Bun Book Store,' 'The Pumpkin Spice Cafe,' and 'The Dead Romantics.'
A grid of 12 book covers under the heading 'Romance p2.' These book covers continue the fall and cozy romance theme, with titles such as 'The Fall of Bradley Reed,' 'Pumpkin Everything,' and 'Love at the Salted Pumpkin Caramel Cafe.'
Ultimate Fall Book Recommendations
#summervibes #lemon8contest #fallbookstack #notmypicture #fallvibes🍂
Samantha_ingold

Samantha_ingold

1943 likes

THRILLER 🔪 Book Recommendations 📚 Part II
Here are five more THRILLERS 🔪 that kept me guessing! Have you read any? ⁉️ #lemon8book #lemon8bookclub #thrillerbooks #booktok #mystery #reading #Lemon8 #lemon8bookclubchallenge #booksoflemon8 #tbr @Lemon8 BookClub
DeLaney 🌞

DeLaney 🌞

541 likes

A stack of books with a text overlay stating, 'Thriller/Mystery books that ACTUALLY shocked me,' indicating a list of recommended books.
The cover of 'Hidden Pictures' by Jason Rekulak, a thriller book recommended as 100% worth it, with a surprising and scary ending.
The cover of 'Pretty Girls' by Karin Slaughter, described as a book that 'made me sick to my stomach' and advises readers to 'proceed with caution and take breaks as needed.'
Thriller/ Mystery Book Recs
Some of my favs! 📖 The endings made me question if I was dumb lol 🥲 Def my fav genre! Lmk if you want more 🫶 #thrillerbookrecommendations #booktok #thrillerbooks #mysterybooks #bookrecommendations
Avi 🥀

Avi 🥀

958 likes

A pile of young adult books, including Caraval, The Hunger Games, and A Good Girl's Guide to Murder, with the text 'YA BOOKS that are worth the hype' overlaid.
Three books from the Caraval Series by Stephanie Garber (Caraval, Legendary, Finale) held in a hand, with text highlighting magical realism, romance, magical games, mystery, and the need to read in order.
Three books from the Once Upon a Broken Heart Series by Stephanie Garber held in a hand, with text noting it's a Caraval spin-off, features magical realism, and requires reading in order after Caraval.
YA BOOK RECOMMENDATIONS 📚
Here are my favorite YA books/series!!! ✨ • CARAVAL 🪄 Stephanie Garber RATINGS: 4⭐️, 4.5⭐️, 5⭐️ — magical realism, magical games, LOTS of mystery, and the romance is AMAZING! — first book follows one couple, second follows another, and the third follows both couples • ONCE UPON A BROKEN H
Koko Kingston🩵

Koko Kingston🩵

1498 likes

A bookshelf filled with various mystery and thriller books, with a text overlay that reads 'Mystery/Crime Books recs'. Book titles like 'The Prince & The Apocalypse' and 'None Shall Sleep' are visible.
A hand holding the book 'The Mary Shelley Club' by Goldy Moldavsky, featuring a dark cover with a woman's profile and red text.
A hand holding the book 'We Were Warned' by Chelsea Ichaso, which has a dark cover depicting a flashlight and red, distressed text.
Mystery/Thriller Book recs
I love reading suspenseful mystery books. They make me really use my critical thinking skills unfortunately. But sometimes it’s just good to sit down with a good book and read the outcome. It’s always a plot twist. For all my mystery/crimes lovers, here are some recs. #mysterybooks #lemon8challe
Nehemiah

Nehemiah

341 likes

✨CHRISTIAN BOOK RECOMMENDATIONS✨
Some life changers here 🤩 #christianbook #jesusgirl
Carlie Wilson

Carlie Wilson

646 likes

A white bookshelf displays various books including 'The Cruel Prince,' 'Love & Gelato,' and 'Sense and Sensibility,' alongside decorative items like a gold geometric lamp and pink glasses. The image is titled 'My Favorite Books Book Recommendations' with floral overlays.
A close-up of the pink book 'Picking Daisies on Sundays' by Liana Cincotti, featuring a vase of daisies on its cover. Text describes it as a best friends to lovers romance, with floral overlays on a patterned background.
A close-up of the book 'Love & Gelato' by Jenna Evans Welch, with a cover showing blue and pink ice cream cones. Text describes it as a cute summer read set in Italy, with floral overlays on a patterned background.
Book Recommendations
Going to start reading other pieces of literature like “Sense & Sensibility,” Pride & Prejudice,” and “Little Women.” 🤍🫧 #bookrecommendations #bookaesthetic #booktok #romancebooks #enemiestolovers #friendstolovers
jas maria 🌸

jas maria 🌸

3079 likes

The image displays the title 'Standalone Book Recs' in black text on a white, silky fabric background. Two red heart-shaped fingerprints are visible in the top left and bottom right corners.
This image features three dark romance book covers: 'Five Brothers' by Penelope Douglas, 'Darling Venom' by Parker S. Huntington, and 'Still Beating' by Jennifer Hartmann. Associated tropes include Enemies To Lovers, Reverse Harem, Smut, Mental Health, Slowburn, Forced Proximity, and Dark Romance.
This image displays three book covers: 'Perfect Strangers' by J.T. Geissinger, 'Green Light' by Jescie Hall, and 'Scorpion' by Avina St. Graves. Associated tropes include Thriller, Dark Romance, Smut, Mystery, Forced Proximity, Second Chance, and Military Fiction.
Standalone Book Recommendations 🖤
#books #bookrecommendations #darkromancebooks #darkromancebooks #books
littleb_TX

littleb_TX

541 likes

A hand holds several books outlined in pink and blue, in front of a white bookshelf filled with various titles. The text overlay reads "trans* sci fi & fantasy," highlighting the theme of the post.
A hand holds the book "The Deep" by Rivers Solomon, featuring a mermaid-like figure on the cover. Text overlays describe it as a story about "magical reshaping of trauma" and "mermaid-esque descendants of enslaved African women thrown overboard."
A hand holds the book "Light From Uncommon Stars" by Ryka Aoki, with a starry cover design. Text overlays describe the plot involving "a master violinist who owes seven souls, a young trans runaway, and an alien who has to run a donut shop," calling it "quirky, raw, and deep."
trans* sci fi & fantasy
book banning and anti-trans legislature is on the rise. let’s celebrate trans* voices instead! ♥️ 🏳️‍⚧️ the deep by rivers solomon, light from uncommon stars by ryka aoki, and cemetery boys by aiden thomas are 3 WONDERFUL sff reads. i have soooo many more recs if you’re interested! i’m on t
Steph 📚💫

Steph 📚💫

776 likes

christian book recommendations
pt. 1 out of many ✨ i have so many books to share with y’all so look forward to more book recs. #best books for christian girls #christianbookrecommendations #christianbookreview #lemon8bookclub #bookwormsoflemon8
starlette

starlette

305 likes

thriller book recommendations 🖤
i’m a sucker for a good thriller book, so here are some of my favs! thrillers are always my go-to when i feel myself falling into a slump. #thrillerbooks #thrillervibes #thrillerbookrecs #bookrecommendations #BookReview #BookReviews
Koko Kingston🩵

Koko Kingston🩵

280 likes

Witchcraft book recommendations
#witchcraft #witchbooks #witchtips #witchcommunity #witchessociety #books #witch #witchtip #witchaesthetic #witchlife
The Baked Witch

The Baked Witch

92 likes

Horror/Thriller Reading Recommendations 🎃
These are some horror/thriller novels I have read over the last few months that I highly recommend!! What Lies in the Woods: thriller/mystery/detective Hidden Pictures: paranormal/mystery/thriller Old Country: paranormal/remote setting/horror September House: haunted house/horror The Winte
LaurenB

LaurenB

376 likes

🧪SCI-FI + PARASITIC HORROR TROPES
🔬Sci-fi horror and parasitic horror overlap, but they don’t feel the same to me. 🔬SCI-FI HORROR is usually about the unknown — aliens, experiments, or something we don’t fully understand yet. 🔬The fear comes from not knowing what it is or how it works. 👾PARASITIC HORROR takes it further.
⛓⛓YÉE⛓⛓

⛓⛓YÉE⛓⛓

143 likes

uncommon mystery/thriller recs 🕵️
I went through a massiveeee mystery/thriller binge a few years ago and wanted to share some books I enjoyed that I don’t see recommended that often. I keep seeing the same handful of thriller recs on tiktok, so I wanted to go against the grain a bit 🤠 ⚠️ Please PLEASE check the full trigger warn
molly

molly

61 likes

Sci-fi Gay MM BOOK RECOMMENDATIONS
Most of these stories have human x monster/alien relationships. They all take place in a Post Apocalyptic scenario. These include MM, BL, Gay, Achiellean Romances. Make sure to read Book Trigger Warnings for the ones that mention it! Chani Lynn Feener is today's writer that specializes i
Eleanor'sTime

Eleanor'sTime

78 likes

indie Sci-Fi Book covers that made me 🫶
If you’ve been here a while you know I read a wide variety of books—just look at my True Crime Stories from last week 🤣🫣. I’ve recently gotten into the Sci-Fi genre and am just stunned by the beautiful covers and worlds built inside them. ⭐️Umbra: Sentient Stars was just.. wow. It grabbed my
Kimmie ᨒ↟

Kimmie ᨒ↟

37 likes

book recommendations for beginners 📚
Here are some good book recommendations for people that want to get into reading but don’t know where to start. (these will get you hooked) 📚 Where the Crawdads Sing - this is a murder mystery that follows “the marsh girl” Kya as she gets accused of murder in a small town. She is resilient and b
romneyellen

romneyellen

768 likes

A collage of science fiction book covers, including 'Project Hail Mary,' 'Red Rising,' 'Dark Matter,' and 'On Earth as It Is on Television,' with the title 'SCIENCE FICTION book recs' in cut-out letters.
The book 'Project Hail Mary' by Andy Weir on a knitted blanket, with text bubbles highlighting its themes: 'lost in space,' 'very science-y but easy to grasp,' 'humorous, yet serious,' 'humanity's last chance,' and '478 pages.'
The book 'The Memory Police' by Yoko Ogawa on a knitted blanket, with text bubbles describing it as 'dystopian,' featuring a 'draconian surveillance state,' 'themes of trauma and loss,' 'translated from Japanese,' and '274 pages.'
sci fi books for the girlies!!
I just finished Red Rising, which is what inspired me to make this list!! Red Rising and Dark Matter are both very dude-bro, if you catch my drift, so be prepared for a lotttt of testosterone 🤪 that being said, Red Rising was very fun and familiar, à la The Hunger Games and Ender’s Game. And Dar
molly

molly

78 likes

Christmas Book Recommendations 📚🎄
Here are some Christmas/Holiday book recommendations! I hope you guys enjoy! ❤️💚 What’s your favorite book? 📕 #books #bookrecommendations #christmas #christmasbooks #fyp
Mary 🪽🩷

Mary 🪽🩷

437 likes

A dark, fiery landscape with a large, ominous castle-like structure, featuring the text "Books that take place in: HELL" and "Includes: comedy!". The Lemon8 logo and user handle are visible.
The book cover for "The Divine Comedy" by Dante Alighieri, translated by John Ciardi, set against a fiery background. It shows two robed figures looking into a fiery abyss with partially submerged bodies. Text states "Highly recommend this translation."
The book cover for "Sign Here" by Claudia Lux, featuring a red trident design, set against a fiery background. Overlay text highlights "Funny!" and "Salespeople" with blue arrows.
Location: Hell | book recommendations 🔥
🔥Dante's Inferno: is the first in a three-part epic poem know as The Divine Comedy. The Inferno is about the poet's journey into Hell. Guided by the poet Virgil, Dante descends through the Nine Circles of Hell, eventually arriving at the center where Satan himself resides. 🔥Sign Here: A
s h e l b y ˙ᵕ˙

s h e l b y ˙ᵕ˙

281 likes

Do you really hate sci-fi?
I'm a certified sci-fi hater but these are some of my exceptions. I think my main sci-fi issues are with AI, Aliens, and monsters but these are all more character driven than spooky science driven which might be what drew me to them. I'm reading stars too fondly right now and it's r
wickedreads ❄️

wickedreads ❄️

119 likes

Book Recommendations If You’re Tired of Romance 📚
I still love a good romance, but something about a mystery or a thriller that will do it for me every time 😭🫶🏾
India 🍓

India 🍓

37 likes

book opinionz 👀
I’ve seen this trend on tiktok but i wanted to join in too! So here are two books i think are overhyped, two books i think are underhyped, and two books i think are hyped up the appropriate amount!! 👀 The Silent Patient and Powerless both reallyyyyy let me down :/ The direction The Silent Pa
molly

molly

789 likes

the MOST underhyped sci fi book
205z: time and salvation by jason michael primrose is SUCH a cool read. it’s an empowering story, encouraging you to recognize your potential against all odds … and to embrace your identity even when everyone else in your life tells you to suppress it. the illustrations were beautiful, the fi
Steph 📚💫

Steph 📚💫

38 likes

Book Recommendations
These all deserve so much more hype! #underratedauthors #bookrecommendations #underratedbooks #bookrecommendation #BookReview
kimberlys.between.pages

kimberlys.between.pages

120 likes

A book cover for 'Burden Falls' by Kat Ellis, featuring a bleeding apple design. Surrounding text snippets highlight themes like 'Cursed Waterfall,' 'Manor House,' 'Haunted Town,' 'Paranormal,' 'Murder,' and 'Riverdale Meets Stephen King,' suggesting a mystery/horror genre.
📍MYSTERY BOOK
#fyp #book #horrorbooks #mysterybooks #bookrecommendations
⛓⛓YÉE⛓⛓

⛓⛓YÉE⛓⛓

10 likes

colorful book recs 🌈📚
Would you believe me if i told you i had zero books with a pink cover?? I thought it would be fun to go through my bookshelves and find a few books of every color and genre— little did i know how HARD it would be to find several colors. One of the yellow books may ~technically~ be orange but sh
molly

molly

186 likes

A graphic titled "ANIME RECOMMENDATIONS" listing genres like Romance, Slice of Life, and Fantasy, with a person taking a selfie in the background, promoting anime content on Lemon8.
A movie-style poster for "Kowloon Generic Romance" featuring multiple anime characters, described as a 2025 sci-fi romance set in a retro-futuristic city, unraveling a mystery.
A movie-style poster for "The Apothecary Diaries" showing two characters in traditional attire, highlighting the 2023 drama, mystery, and romance anime about a clever palace servant.
ANIME RECOMMENDATIONS
🎴 8 Anime You’ll Be Glad You Watched 1. Kowloon Generic Romance A slow-burn sci-fi romance wrapped in mystery and nostalgia. 2. Unnamed Memory A cursed prince, a powerful witch, and fate that won’t quit — fantasy with heart. 3. The Apothecary Diaries A clever servant girl solves palace myst
Halley 🌿 Healing Era

Halley 🌿 Healing Era

115 likes

My Top 5 Christian Book Recs‼️
Here are five of my top Christian fiction book recs! I trust these authors 100% and highly encourage you to check them out! Read the short blurbs below to see what they’re about 🤗 Obsessed: 18+ A dark suspense about a man who receives a hefty inheritance and is subsequently targeted by a dement
Valicity Elaine

Valicity Elaine

364 likes

My Favorite Crime/Mystery Book Series
This Book Series Had Me On The Tip Of My Toes, With All The Twists And Turns. In the first book, high schooler Pippa Fitz-Amobi has discovered an interest in a closed murder case that happened in her small town. Out of curiosity Pip starts investigating on her own to find out the truth and bring
KTheBae

KTheBae

85 likes

I read every book Timothée Chalamet recommends
I read every book Timothée Chalamet has recommended and his taste is WILD! Ever wondered what goes on inside Timothée Chalamet's head? I'm talking about sci-fi epics with sandworms, heart-wrenching coming-of-age stories that'll leave you needing tissues, and let not talk about th
Meredith Jao

Meredith Jao

345 likes

An overhead shot of six numbered sets of paint samples on a yellow textured background, with the title 'pick a color scheme get a book rec' in green and white text. Each set contains 5-6 color swatches.
Book #1, 'On Earth As It Is On Television,' is shown with yellow, orange, and dark blue paint samples. The book is a 400-page literary science fiction novel about an alien invasion, featuring a cat on a TV on its cover.
Book #2, 'The Decagon House Murders,' is shown with white, dark red, and dark blue paint samples. This 284-page thriller, murder mystery, and horror novel features a geometric blue and red cover design.
book recs but randomize it
Did i comb through all of my paint samples to find color schemes that matched these covers almost exactly? Yes. Am i upset the teal colors wouldn’t come through on the camera? Yes. Why do i even have so many paint samples? …no reason 👀👀 Jk, i use them for bookmarks! I love matching sampl
molly

molly

474 likes

A hand holds the book 'One By One' by Freida McFadden, featuring a dark house cover. Overlays read 'Done Reading' and 'Worth the Hype', indicating a book review.
Mystery Book Review!
I will rate this a 4/5 👌🏽👌🏽 Freida Mcfadden has not disappointed me yet with her books! The twists and endings always leave you like... 😮 I was trying to figure out who was doing what the whole time and was so wrong lol. I definitely recommend this book! Any of her books really! I'm
Epiphany

Epiphany

48 likes

An image with the text "THRILLER BOOKS I'VE READ THAT I RATED 5 STARS" and two yellow stars, set against an autumn forest road background. It introduces a list of highly-rated thriller book recommendations.
The book cover for "THE INMATE" by Freida McFadden, featuring a dark corridor, is displayed against an autumn forest road. Overlay text reads "WTF?!" Ending, suggesting a shocking conclusion.
The book cover for "LOCAL WOMAN MISSING" by Mary Kubica, showing a forest under a cloudy sky, is presented against an autumn forest road. Overlay text highlights a "HUGE TWIST!" in the story.
Thriller 🔪 book recommendations 📚
These books had me intrigued the whole way through! 🤯 What thriller books have you guys rated 5 stars? 📚 #thrillerbookrecommendations #mysterybooks #freidamcfadden #colleenhoover #thrillerbooks
sweetpea ❤️‍🔥

sweetpea ❤️‍🔥

56 likes

See more