What happens when two serial killers begin to compete with each other? From #1 New York Times bestselling author Meg Gardiner comes a new high-octane thriller in the acclaimed UNSUB series. FBI Special Agent Caitlin Hendrix faces a case from nightmares. In a Tennessee prison, Efrem Judah Goode draws haunting portraits of women he claims he has killed. Around the country, desperate families of the missing seek answers in his eerie...