Best-selling author Rick Riordan presents best-selling YA author Roseanne A. Brown's vampire slayer adventure influenced by 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, a Slayer, and knows that some fireflies are really adze, shapeshifting vampires from the forests of Southeastern Ghana. When an adze infiltrates...