Prodigal Son Mysterious Book Report No. 434 by John Dwaine McKenna Best selling author Gregg Hurwitz’s newest installment in his compelling Orphan X series has just been released. Prodigal Son, (Minotaur, $27.99, 416 pages, ISBN 978-1-250-25228-9) begins when Evan Smoak—the legendary government assassin known as X, the tenth orphan, who was recruited in his pre-teen years and trained to kill—is lured out of retirement by the unlikeliest of sources: