"When Milo, Tilly, Oskar, and Alessia venture into Arthurian legend to find the first bookwanderer--the wizard Merlin--they discover that the magic of bookwandering is not at all what they thought. Together, they must journey into Greek and Roman mythology to bargain with the trickster Loki and find a way to untangle the Alchemist's grip on the world's imagination. And to save Pages & Co. and protect the very foundations of bookwandering, the friends will have to learn the true power of imagination, all while an unexpected enemy stands in their way." -- Provided by publisher.