"Blood for Blood" is a novel by Ryan Graudin that serves as a sequel to her earlier work, Wolf by Wolf. The story is set in an alternate history where World War II ended differently, and it follows the journey of Yael, a young woman with the ability to shapeshift. She is on a mission to assassinate Hitler and change the course of history. The narrative explores themes of identity, revenge, and the consequences of war. As Yael navigates a world filled with danger and betrayal, she must confront her past and the moral complexities of her quest. The novel combines elements of adventure and historical fiction, engaging readers with its fast-paced plot.