Jonathan Kellerman is an American crime novelist and clinical psychologist best known for the Alex Delaware series, beginning with When the Bough Breaks. The books pair Dr. Alex Delaware, a child psychologist, with LAPD homicide detective Milo Sturgis, creating... a long-running partnership built on psychological insight, police procedure, and mutual trust. Kellerman’s professional background gives his thrillers a distinctive focus on trauma, family dysfunction, behavioral motive, and the emotional roots of violence. Set largely in Los Angeles, the series uses the city’s wealth, secrecy, diversity, and hidden damage as a recurring backdrop for complex investigations. Beyond Alex Delaware, Kellerman has written other suspense novels and collaborations, but his lasting appeal lies in psychologically rich crime fiction where motive matters as much as evidence.