Fred Waitzkin has written two books about chess. His first, "Searching For Bobby Fischer," is about his young son Josh's gift for the game. The book was made into a movie of the same name. Waitzkin's latest book is called "Mortal Games." It's a portrait of the world chess champion Garry Kasparov as he prepared, in 1990, to defend his title against sworn enemy Anatoly Karpov.