After receiving a sudden surge of junk mail directed at new parents—even though his wife at the time was merely pregnant— Erik Larson, the National Bestselling author, set out to explore the lengths companies go to spy on individual consumers.

Posing as a CEO of a fictitious direct-mail corporation, Larson infiltrated companies that gather and sell personal information to assist businesses in their marketing campaigns. He discovered the systems used to gather personal data, the staggering amount of personal information companies can gather, and the government’s role in helping companies learn about you.