This inspiring nonfiction pick highlights several unconventional allied spies who plotted against the Nazi regime. . . .The layout of the book is extremely appealing to reluctant readers, as it has double-spaced, short chapters with file tab images on the edge of the pages, giving the illusion of spy folders. . . .Fans of both non-fiction and historical fiction will be riveted by this book, and will likely savor the other three titles in Capstone's SPIES! series, which reflect World War I, Cold War, and Modern Time eras. Readability makes this a dynamite choice for middle grades, although older teens and adults will also revel in the intriguing anecdotes. * YALSA, The Hub *