"The Spy Who Couldn't Spell: A Dyslexic Traitor, an Unbreakable Code, and the FBI's Hunt for America's Stolen Secrets" is a non-fiction book by Yudhijit Bhattacharjee. The book was first published in 2016 and tells the true story of Brian Patrick Regan, a U.S. Air Force sergeant and CIA contractor who was arrested in 2001 for attempting to sell classified information to the Iraqi and Libyan governments. The book explores Regan's life, his motivations for espionage, and the FBI's investigation and ultimate capture of him. The title of the book refers to Regan's dyslexia, which played a role in his decision to become a spy and in the methods he used to communicate with foreign governments. The book received positive reviews for its in-depth and compelling account of the case and its exploration of the complex personal and psychological factors that led to Regan's actions.