Introducing the epic new adventure series that School Library Journal said "is sure to keep lovers of Rick Riordan running to the shelves," and PopSugar named one of the top twenty books to read after Harry Potter. Haunted by a dream of a mythical gryphon, twelve-year-old Sam London uncovers an ancient secret that will change the way he sees the world forever. Recruited by Dr. Vance Vantana, an eccentric zoologist and park ranger sent by the government, Sam is whisked away on an adventure that takes him to the farthest reaches of the globe. ​​​​​​​ Along this journey, Sam learns an incredible truth: mythical creatures are real and living among us in our majestic national parks! A special department in the U.S. government ensures that their existence remains hidden. But Sam's dream is an omen that the secret may now be in danger! A dark force seeks the power to expose these creatures and overthrow humankind-and that power can only be found in a magical talisman known as the gryphon's claw. Praised by Publisher's Weekly as a "death-defying, globe-spanning adventure, packed with creatures out of folklore and myth," and hailed as "The American Harry Potter" by New York Times bestselling author Martin Olson, "Guardians of the Gryphon's Claw" is a thrilling adventure about destiny, friendship, and the power of belief. Heed your call to adventure and buy your copy today!