The Cuckoo's Egg is a true cybersecurity story that chronicles astronomer and computer systems administrator Clifford Stoll's investigation into a small accounting error that revealed a major international computer intrusion. Set in the early days of the internet, the book follows Stoll's pursuit of an unknown hacker who was accessing military and government networks, leading to one of the first widely known cyber espionage investigations. Blending computer science, detective work, and personal storytelling, the book provides a fascinating look at the origins of cybersecurity, the challenges of tracking attackers, and the importance of vigilance in protecting digital systems.