His family moved to Los Angeles when Jonathan was nine, the same year he began writing stories. He wrote fiction obsessively throughout college and graduate school, penning at least eight unpublished novels while working to become a child psychologist.
Kellerman completed his post-graduate work at Children’s Hospital in Los Angeles, where he worked until the early 1980s, when he opened his own practice. He and his wife, best-selling author Faye Kellerman, had four children, and he wrote every night from 11 p.m. to 1 a.m.
In 1985, his first novel, When the Bough Breaks, was published. The book, about murder and child abuse, won a handful of prestigious mystery awards and was made into a television movie. Since then, Kellerman has written more than 30 novels as well as several essays and children’s books.