The Agent of Death is the third of Nelson DeMille's novels about NYPD Sergeant Joe Ryker. It was published in 1974, and then republished in 1989 with the DeMille pseudonym Jack Cannon as the author and The Death Squad as the title. The story focuses on Ryker's attempt to stop an unstable CIA assassin in New York City. External links 1974 American novels Novels by Nelson DeMille Novels set in New York City Leisure Books books