A boy called Christopher is visiting his reclusive grandfather when he witnesses an avalanche of mythic creatures come tearing down the hill. This is how Christopher learns that his grandfather is the guardian of one of the ways between the non-magical world and a place called the Archipelago: a cluster of magical islands, where all the creatures we tell of in myth live and breed and thrive alongside humans. They have been protected for thousands of years from being discovered; now, terrifyingly, the protection has worn thin, and creatures are breaking through.

Author, Katherine Rundell,. Interior illustration by Tomislav Tomic, map by Virginia Allyn, cover illustration by Daniel Egneus; Cover designer, Laura Bird