Best known for his thrilling mystery series starring child psychologist Alex Delaware, Jonathan Kellerman is the author of more than forty novels, and has also co-authored books with his wife, suspense writer Faye Kellerman, and with his son, Jesse Kellerman. Jonathan Kellerman was a child psychologist before becoming a full-time writer. Some of his popular titles are the award-winning When the Bough Breaks, Killer, and Guilt.