The Final Descent (Monstrumologist Series #4)

Will Henry and Dr. Warthrop have encountered many horrors together—but can Will endure a monstrumological terror without his mentor?

Will Henry has been through more that 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 Will’s loyalties may be shifting, he turns on Will with a fury, dete...