David Stanhope is an average twelve-year-old. His friends are geeks. School is an endless series of humiliations. And his summer vacation is about to be wasted at a broken-down cabin in the middle of nowhere. But there's a secret lurking in David's attic. It transports him and his sister Amanda to the magical world of Abraxas where dragons scour the prairie for prey and centaurs patrol in search of humans. They learn that the people of Abraxas live in fear of a centuries-old sorcerer who has spent his life trying to impose his evil rule on the entire land. If he discovers who David and Amanda really are, they will be forced to help him - or be destroyed. Before the Stanhopes can escape back to their own world, they need answers: How did a priceless treasure end up in their attic? Why is a dragon afraid of a compass? Can a centaur wear a tool belt? Why is a huge talking frog following Amanda? And what is Lucy the Moat Monster's favorite food? Maybe David isn't so average after all.