Hayden Keyes knows everything there is to know about knights and the legends of King Arthur. But that doesn't mean he has ever jousted on horseback, worn a suit of armor, or flown on the back of a dimension-traveling griffin. In fact, Hayden's life is pretty ordinary. Well, perhaps ordinary is up for debate. Hayden never met his real parents, though his foster ones are great. Sure, they have a bit of a hoarding problem and an irrational fear...