Torre, who managed the Yankees from 1996-2007 before taking over the Los Angeles Dodgers last season, also says he was betrayed by Cashman, New York's longtime general manager, the Daily News reported on its Web site.
Torre had a hot-and-cold relationship with Yankees ownership, including George Steinbrenner, but Cashman was thought to be a consistent ally. The GM did not immediately return a phone message from The Associated Press.
The book, co-authored by Sports Illustrated's Tom Verducci, is due out Feb. 3 and is being published by Doubleday. It is not a first-person account but instead a third-person narrative by Verducci based on dozens of interviews with Yankees players and employees, ESPN.com reported, citing an unidentified source.
In the book, Torre also says Steinbrenner learned the manager had prostate cancer (during spring training 1999) before Torre even had a chance to inform him.
Torre guided the Yankees to the postseason in all 12 years as manager and won four World Series titles from 1996-2000. But he was offered a one-year contract with a pay cut after the 2007 season, following New York's third straight first-round playoff exit.
Torre turned down the proposal, saying he felt insulted by the offer of bonuses based on postseason performance. He soon agreed to a three-year contract with the Dodgers and led them to the NL championship series last year before they were eliminated by the Philadelphia Phillies, who went on to win the World Series.