Gingersnap — Patricia Reilly Giff

It's 1944, W.W. II is raging. Jayna's big brother Rob is her only family. When Rob is called to duty on a destroyer, Jayna is left in their small town in upstate New York with their cranky landlady. But right before he leaves, Rob tells Jayna a secret: they may have a grandmother in Brooklyn. Rob found a little blue recipe book with her name and an address for a bakery. When Jayna learns that Rob is missing in action, she's devastated. Along with her turtle Theresa, the recipe book, and an encouraging, ghostly voice as her guide, Jayna sets out for Brooklyn in hopes of finding the family she so desperately needs.