From the dust jacket flap:

Romulus has returned! So has the Penitent!

In a rare publishing event, David Morrell brings back the heroes from two of his bestselling thrillers, The Brotherhood of the Rose and The Fraternity of the Stone, and joins their forces for the excitement of a double sequel in The League of Night and Fog.

Though Saul and Drew are both master operatives with similar nightmarish pasts, their paths have never crossed - until now. For now, a new story has begun. Powers beyond their control have set it in motion, compelling Saul and Erika to abandon their home and prompting Arlene to track down Drew to relay to him a mysterious summons. For Erika's father has disappeared, the Fraternity of the Stone hasn't finished with Drew, and, after forty years, the Night and Fog seems to have resumed its reign of terror. Old men are disappearing; a secret arms deal is about to take place; a cardinal is viciously murdered.

As Saul and Drew pursue their separate goals, their paths converge until until, at the heart of the Eternal City, in the Vatican gardens, they meet. Each has the answers the other needs. Each has skills that complement the other's. Together, on an epic quest, they must confront the Night and Fog and discover its terrible secret.

In The League of Night and Fog, David Morrell has created yet another gripping, complex thriller. His style has never been faster, his action never more sensational. Romulus and the Penitent are back.

So is Morrell.

Releasing through the "Tick Tock" challenge (NIGHT)