The Final Descent (Monstrumologist Series #4)

In the fourth and final horrific adventure in the award-winning Monstrumologist series, Will Henry encounters unprecedented terror, a terror that delves into the depths of the human soul.

Will Henry has been through more than seems possible for a boy of fourteen. He’s been on the brink of death on more than one occasion, he has gazed into hell—and hell has stared back at him, and known his face. But through it all, Dr. Warthrop has been at his side.

When Dr. Warthrop fears that Wil…