The second entry in the slightly scary, extremely addictive contemporary middle-grade series from New York Times bestselling authors Lisi Harrison and Daniel Kraus—perfect for fans of scary stories for kids, like R. L. Stine’s Goosebumps, or books for preteens, like Ann M. Martin’s The Babysitters Club.   It’s been a month since the events of 1-2-3-4, I Declare a Thumb War, when the Graveyard Girls—Gemma, Whisper, Sophie, Frannie, and Zuzu—discovered Silas Hoke’s empty grave.