Kevin Federline, ex-husband of Britney Spears, announces memoir on marriage and fame.

Kevin Federline, ex-husband of Britney Spears, is releasing his memoir titled "You Thought You Knew" on October 21. The book will detail his career as a dancer with artists like Destiny's Child and Michael Jackson, his marriage to Spears from 2004 to 2007, and the challenges of fatherhood amid media scrutiny. Federline and Spears share two sons, Sean Preston and Jayden James. The memoir, narrated by Federline himself, will be the debut release from Listenin, a new audiobook imprint.