I Led Three Lives: Citizen, Communist, Counterspy, first published in 1952, is a fascinating account of the author's infiltration into the American Communist party in the 1940's as a counterspy who then passed on his information to the FBI. Beginning as an advertising executive in Boston, Philbrick was inadvertently drawn into a front organization of the Communist Party. He was subsequently recruited by the U.S. Government to document Soviet efforts, operations and plans in the U.S.A. The book concludes with his testimony at the 1949 trial of the top eleven Communist Party-USA leaders. I Led Three Lives was a bestseller after its 1952 release, and was made into a popular television series of the same name. Included are five pages of illustrations.