The "Wolf by Wolf Series" is a young adult historical fiction series written by Ryan Graudin. It consists of two main books: "Wolf by Wolf" and its sequel, "Blood for Blood." The story is set in an alternate history where the Axis Powers won World War II, and it follows a young girl named Yael, who is a survivor of a concentration camp with the ability to shapeshift. In the series, Yael enters a motorcycle race across Europe to assassinate Adolf Hitler. The narrative explores themes of identity, resilience, and the impact of war, while blending elements of adventure and fantasy. The series has received critical acclaim for its unique premise and character development.