A tell all book claims more cheating and doping against a former Tour de France champion.

Last month, Lance Armstrong was stripped of his seven Tour de France cycling titles and now a tell all book is out from a former teammate that is bringing to light more about the embattled social icon.

Tyler Hamilton, Armstrong's former teammate and author of The Secret Race, says writing his tell-all book about Lance Armstrong felt like taking "a thousand-pound backpack" off his shoulders in an interview with the Associated Press.

Hamilton says he always thought he'd take some of the secrets about doping and cycling to the grave with him, but all that changed he received a subpoena to testify to a grand jury looking into the Armstrong case.

Hamilton, 41, rode with Armstrong on the U.S. Postal Service team until 2001 and goes into detail about the three years of covering for Armstrong and lying for him about his alleged use of performance enhancing drugs.

The book was released Wednesday and is available Amazon.