Impossible Creatures - Katherine Rundell

It was a very fine day, until something tried to eat him. A boy called Christopher is visiting his reclusive grandfather when he witnesses an avalanche of mythical 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 from