Ryan David Jahn

His fifth, The Gentle Assassin, was released in September 2014.

His fourth, The Last Tomorrow, was released in July 2012. Set in 1952, it concerns political corruption, censorship, and drug addiction. The story revolves around a man falsely accused of murder attempting to clear his name.

His third novel, The Dispatcher, was released in June 2011, and was listed as one of the Financial Times' top ten crime novels of the year, as well as being long-listed for the Crime Writers' Association Ian Fleming Steel Dagger. It was inspired, in part, by the kidnapping of Jaycee Lee Dugard, though the details of the novel bear no relation to the facts of the case, with characters, events and locations being entirely fictional. It concerns the kidnapping of a seven-year-old girl and her father's attempts to rescue her, when, seven years later, months after she has been declared dead, he learns that she is still alive.

Jahn's second novel, Low Life, was released on 2 July 2010. He has said in interview that "it's about a payroll accountant who lives a lonely, friendless life. One night while he's asleep in bed someone breaks into his apartment and tries to murder him. During the altercation he ends up killing his assailant, and rather than calling the police, he puts the body on ice in his bathtub and tries to find out who wanted him dead and why."

His first novel, Acts of Violence, takes place over a period of three hours and revolves around the murder of Katrina Marino, a bar manager stabbed in the courtyard outside her apartment block. Her murder is witnessed by several people, none of whom call the police or try to help, as each denies responsibility, an example of the bystander effect. Though inspired by the murder of Catherine Genovese, the case that first spurred research into the diffusion of responsibility, Jahn has said he wasn't interested in writing a didactic work. "I didn't want to create symbols; I wanted the story to be inhabited by people." Upon release in 2009 it was both praised as "compassionate and authentic," and criticized for containing "relentless, near-pornographic brutality," though overall critical reception was positive, and it won a Crime Writers' Association John Creasey Dagger for best first novel.

Ryan David Jahn (born 1979) is an American novelist and screenwriter.