"Engines of Liberty" is a book that explores the role of technology in promoting social justice and civil rights. It examines how innovations, such as the internet and mobile devices, empower individuals and communities to advocate for their rights and challenge oppressive systems. The authors, David Cole and Jennifer Granick, highlight various case studies that illustrate the impact of technology on movements like Black Lives Matter and Me Too. They argue that while technology can be a tool for oppression, it also serves as a powerful engine for liberty and change in society.