A strange metal cylinder. A three-foot-tall bug-man. A dangerous world beneath the earth. Eleven-year-old Harper Graybridge never expects that one junkyard discovery will launch him into an underground realm filled with bizarre creatures, ancient ruins, and secrets powerful enough to change his life forever. When Harper meets Lyt—an insectoid traveler searching for the mysterious “keeper”—he’s offered the adventure he’s always dreamed of in the subterranean world of Murkmor. But Murkmor is far from safe. Poisonous jelly-monkeys stalk the forest, giant worms double as underground slides, and an evil overlord named Baron Vyndot believes Harper’s discovery is the key to unlocking a long-forgotten legend. With the help of Lyt and a fierce bird-warrior named Crowll, Harper must navigate deadly tunnels, crumbling ruins, strange new allies, and a villain determined to control Murkmor’s most dangerous secrets. Courage, friendship, and quick thinking may be the only things that can get him back home—alive. Perfect for readers who love: imaginative underground fantasy worlds - creature-filled adventures - fast-paced, page-turning action - friendships forged under impossible circumstances - middle grade heroes facing danger with heart Awards Gold Medal Winner – Readers' Favorite Awards 2025 - First Place – The BookFest Spring 2025 - Finalist – Colorado Authors' League 2025 - Finalist – National Indie Excellence Awards 2025 - Winner – Best Indie Book Awards 2025 Keeper of the Gremkat Key is a wildly imaginative, creature-packed middle-grade fantasy perfect for fans of adventure, humor, mythic worlds, and unforgettable heroes. Begin the adventure. Discover Murkmor.