Cross My Heart and Hope to Spy

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Cross My Heart and Hope to Spy is a young-adult fiction novel written by Ally Carter. It is the sequel to I'd Tell You I Love You, But Then I'd Have To Kill You the second book in the Gallagher Girls series. It was published on October 2, 2007. The cover was released on January 30, 2007, The title was announced at the end of a code breaking competition on November 22, 2006.