London Calling (by Edward Bloor)

In her will, though, she leaves him an antique radio. When he tries it out, a boy with a British accent emerges, and eventually leads Martin back to WWII-era London during the Blitz. He says he needs Martin's help, but the help he needs will require more heart and courage from Martin than he ever knew he had.

This immensely satisfying novel will remind fans of author Edward Bloor's first book, Tangerine, in its complexity, empathy for the downtrodden, and sweet revenge scenario in which the bullies get what they so richly deserve. A fascinating historical element enriches the tale. While many aspects of World War II have been addressed in children's books, including the evacuation of children from London, rarely has the life of ordinary Londoners who stayed behind been depicted so intriguingly -- and horrifyingly.

The book is not without its flaws. The only marginally likable adult is Martin's father, a sad sack, helpless alcoholic who is kind -- which gives him a leg up on any other adult here. And the revenge scene, so enjoyable in its way, is marred by a laughable lack of consequences. But these are quibbles that will barely be noticed in such a moving and satisfying story.