New York Times bestselling author Jonathan Kellerman is one of the world's most popular writers, with tens of millions of his books in print in two dozen languages. He has brought his expertise as a child psychologist to numerous tales of suspense, including fourteen critically acclaimed and bestselling novels featuring child psychologist sleuth Alex Delaware. Now, for the first time, here are two of his popular Alex Delaware books in one volume. Taunt, penetrating, terrifying, Devil's Waltz and Bad Love are Kellerman at his best. From the hospital to the street, Delaware follows mysterious killers in two of the most suspenseful works ever, tracking them down through a combination of keen perception and psychological expertise. In Devil's Waltz, Delaware explores a dark side of parental love. In Bad Love, Delaware follows the twisted logic of a stalker's mind games, aware that next the stalker may be coming for him. In both, weaving a web of disturbing events that will thrill and captivate as he reveals their stunning conclusions.