Libris. But something strange is going on. Besides the security cameras everywhere, there’s Dr. Libris’s private bookcase. Whenever Billy opens the books inside, he can hear sounds coming from the island in the middle of the lake. The clash of swords. The twang of arrows. Sometimes he can even feel the ground shaking. It’s almost as if the stories he’s reading are coming to life! But that’s impossible . . . isn’t it?

    Part animal and part human, the groundlings toil in classroom and factory, forbidden to enjoy anything regular children have, most particularly singing and music. For the Wonderling, an innocent-hearted, one-eared, fox-like eleven-year-old with only a number rather than a proper name -- a 13 etched on a medallion around his neck -- it is the only home he has ever known. But unexpected courage leads him to acquire the loyalty of a young bird groundling named Trinket, who gives the Home's loneliest inhabitant two incredible gifts: a real name -- Arthur, like the good king in the old stories -- and a best friend. Using Trinket's ingenious invention, the pair escape over the wall and embark on an adventure that will take them out into the wider world and ultimately down the path of sweet Arthur's true destiny.

    Without humans around, there is no war, no pollution, no crime. Every member of society has a purpose. Everything runs smoothly and efficiently. Until the day XR discovers something impossible: a human girl named Emma. Now, Emma must embark on a dangerous voyage with XR and two other robots in search of a mysterious point on a map. But how will they survive in a place where rules are never broken and humans aren’t supposed to exist? And what will they find at the end of their journey?