Blackmailed into service during World War II, Ilse lends her magic to America's newest weapon, the atom bomb, while Wolf goes behind enemy lines to sabotage Germany's nuclear program in this companion to the Sydney Taylor Book Award honoree "The Girl with the Red Balloon."

Katherine Locke lives in a very small town outside of Philadelphia, Pennsylvania, with her feline overlords. In addition to fiction, she writes about books and reading and has contributed to The Forward, The GayYA, Teen Librarian Toolbox, and other sites. The Girl with the Red Balloon was her YA debut.