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Kevin Federline's Oct. 21 memoir, You Thought You Knew, recounts his rise from Fresno and, chiefly, his turbulent marriage to Britney Spears. He alleges Spears drank while pregnant, used cocaine, engaged in sexual scenarios with staffers, partied with Lindsay Lohan and Paris Hilton as their sons cried, and once frightened a child while holding a knife. Spears' camp calls the book profiteering after child support ended, saying she cares about Sean Preston and Jayden James. Federline says he wrote for his children, frames it as a warning about her well-being, and notes the boys' contact with her remains "fluid."

Prepared by Emily Rhodes and reviewed by editorial team.