Alan Dershowitz dedicates “The Trials of Zion” to the memory of his mother, who, he tells us, “always encouraged and defended me. She would have liked this book.” A reader would have to possess a heart of stone not to appreciate such a combination of love and confidence before even arriving at page one. Indeed, for a book in which the Palestinian, Israeli and American heads of state die violently by the end of the prologue, Dershowitz’s third novel is remarkably imbued with these two virtues. And why wouldn’t it be? Its protagonist is Abe Ringel, a Jewish American trial attorney and Harvard law professor famous for exonerating criminal suspects most lawyers wouldn’t have the chutzpah to defend, i.e., he bears a striking resemblance to Claire Dershowitz’s estimable son.