Kevin Federline's book 'You Thought You Knew.' Courtesy of Listenin Share on Facebook Share on X Share to Flipboard Send an Email Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Print the Article Post a Comment The Britney Spears saga is about to take another hairpin turn with the Oct. 21 release of ex-husband Kevin Federline's shocking tell-all, You Thought You Knew.