The Selkie of San Francisco

In the thrilling sequel to Guardians of the Gryphon's Claw, an epic adventure novel that "is sure to keep lovers of Rick Riordan running to the shelves," Sam London dives headlong into his second case involving a selkie, a mysterious girl, and an ominous new threat to the mythical and human worlds (School Library Journal)!

Sam London didn't mean to uncover an ancient secret, but when he found out that mythical creatures are real and living in our national parks, he became the newest recruit ...