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About The Book

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 Will’s loyalties may be shifting, he turns on Will with a fury, determined to reclaim his young apprentice’s devotion. And so Will must face one of the most horrific creatures of his monstrumology career—and he must face it alone.

Over the course of one day, Will’s life—and Pellinor Warthrop’s destiny—will hang in the balance. In the terrifying depths of the Monstrumarium, they will face a monster more terrible than any they could have imagined—and their fates will be decided.

“Beyond a simple finale, this is a brave statement about the duplexity of good and evil, and the deadly trap in which all of us are snared” (Booklist, starred review).

About The Author

Photograph courtesy of the author

Rick Yancey is the author of The Monstrumologist, The Curse of the Wendigo, The Isle of Blood, and The Final Descent. He is also the author of The Fifth Wave series. Rick lives with his wife Sandy and two sons in Gainesville, Florida. Visit him at RickYancey.com.

Product Details

  • Publisher: Simon & Schuster Books for Young Readers (September 10, 2013)
  • Length: 320 pages
  • ISBN13: 9781442451551
  • Grades: 9 and up
  • Ages: 14 - 99
  • Lexile ® HL760L The Lexile reading levels have been certified by the Lexile developer, MetaMetrics®

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Raves and Reviews

* "It can now be said with assurance that The Monstrumologist series is a landmark of modern YA fiction...Beyond a simple finale, this is a brave statement about the duplexity of good and evil, and the deadly trap in which all of us are snared."

– Booklist, starred review

"The Monstrumologist series proves young adult literature is capable of being intelligent, thought provokidng, and horrifyingly dark."

– Romantic Times Book Review

"Should thrill and horrify—in the best way possible—ardent and loyal fans."

– The Horn Book

* "A little bit of Mary Shelley, H.P. Lovecraft, Hitchcock, and Poe are brought to bear in this heavy tale...Adults who love YA will enjoy this one, too."

– VOYA, 5Q 5P S, starred review

Awards and Honors

  • Booklist Editors' Choice
  • Florida Book Award Gold Medal, YA
  • MSTA Reading Circle List

Resources and Downloads

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More books from this author: Rick Yancey

More books in this series: The Monstrumologist