Best-selling author Rick Riordan presents best-selling YA author Roseanne A. Brown's middle grade debut about a pre-teen vampire slayer with a strong helping of Ghanaian folklore. For most kids, catching fireflies is a fun summer activity. For twelve-year-old Serwa Boateng, it's a matter of life and death. That's because Serwa knows that some fireflies are really adze, shapeshifting vampires from the forests of Southeastern Ghana...