What if, before finishing the final book of her phenomenally popular children's book series, the author were to mysteriously die? This is what happened to Fern Caldwell, author of the "Sydney Wakefield" books. The series about a young girl who travels to Avalon to rescue King Arthur from an evil Morgan le Fay is Henderson Green's favorite. When Fern dies, Henderson is devastated. But when Fern Caldwell's ghost appears to him, asking for help, Henderson realizes he is the only one who can help her finish the final book and get it published. Why is this so important? Because the real Sydney is trapped in Avalon with King Arthur. With Henderson's help, Fern can finish the story and write Sydney and King Arthur out of Morgan's dark realm once and for all. Henderson finds himself playing a role in the story where the lines between what is real and what is fiction are blurred, where his favorite literary characters actually exist, and where the fate of the once and future King hangs in the balance.