FBI Agent Ella Dark has studied serial killers from the time she could read, devastated by the murder of her own sister, and has gained an encyclopedic knowledge of murderers. But when a new killer taunts Ella, chaining up victims and leaving them to die, Ella must solve the riddles and beat him at his twisted game. Can Ella piece together the answers before time runs out?

FBI Agent Ella Dark, 29, is given her big chance to achieve her life’s dream: to join the Behavioral Crimes Unit. Ella’s hidden obsession of gaining an encyclopedic knowledge of serial killers has led to her being singled out for her brilliant mind, and invited to join the big leagues.

With this new killer though, Ella is personally taunted, and the stakes have never been higher.

Can she solve the puzzle in time to free this twisted killer’s next victim?

And can she anticipate the shocking final twist before she is caught by surprise?

A harrowing crime thriller featuring a brilliant and tortured FBI agent, the Ella Dark series is a riveting mystery packed with suspense, twists and turns, revelations, and driven by a breakneck pace that will keep you listening late into the night.