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 drawings. And on darkened...