Caroline Criado Pérez’s Invisible Women is a groundbreaking work that exposes the pervasive data bias experienced by women in a world largely created from a male perspective. The book meticulously documents how the exclusion of female-specific data in various sectors—from healthcare to urban planning—leads to systemic disadvantages for women. Published to critical acclaim, Invisible Women addresses the invisible gender gap embedded in everyday environments and institutional policies, calling attention to the consequences of designing systems primarily for men. This reality has tangible impacts, including misdiagnosis in medical treatment, unsafe public spaces for women, and workplace conditions that fail to account for female needs. The Marxist feminist lens applied in this review deepens the critique by connecting data bias with broader socio-economic structures and power dynamics. It emphasizes that such exclusion is not merely incidental but tied to capitalist and patriarchal systems that marginalize women’s lived experiences and labor. The book is also notable for its extensive research and use of compelling statistics supported by rigorous academic work, enhancing its authority and credibility. It challenges liberal feminist approaches by arguing that addressing gender bias requires systemic change rather than surface-level reforms. Invisible Women has resonated widely, evidenced by over 156,000 ratings and active discussions across platforms like BookTok and leftist forums. It has sparked an important conversation about how data-driven decisions often ignore half the population, reinforcing the need for inclusive and equitable information practices. This work is essential reading for anyone interested in feminism, social justice, data science, and policy-making. It highlights the urgency of recognizing women’s experiences in data collection and societal design to build a more equitable world. By presenting a Marxist feminist critique, it pushes readers to reconsider assumptions about neutrality in data and challenges readers to demand systemic reforms that prioritize inclusivity and justice.