Bonds to Sue

Barry Bonds apparently sent a letter to the authors of "Game of Shadows" threatening to sue them. I guarantee this will never happen. As Paul's Poop legal expert, The Concierge, says, the truth is the best defense. We know most if not all of the book is true so I can't figure out what Bonds is going to say. The only thing I think he can say is that his grand jury testimony was illegally leaked, but in that case, isn't the leaker responsible?