In a world of angels, is there a devil in their midst?

While Monica and Thomas prepare for a new beginning, the Deadly Dozen face their darkest case yet. A string of murders near Catherine's church leads to a chilling a Bible left open on the altar, each passage containing a twisted message from a killer who may be connected to the congregation.

The two main suspects could not be more different—one, a charismatic and attractive young American, the other an awkward, introverted music teacher. It takes a ghost from Monica's past to help unravel the clues.

As tragedy strikes and loyalties are tested, the Twelve unite across continents for one final, dramatic mission. But Monica's bold plan to stop a killer could cost them everything—even her own happy ending.

Sinister, sharp, and unputdownable— Secrets of the Deadly Dozen is the final breathtaking instalment of the trilogy.