From the New York Times bestselling author of Escape From Mr. Lemoncello's Library and coauthor of I Funny and Treasure Hunters, comes a series of spine-tingling mysteries to keep you up long after the lights go out.
Zack is about to start at his new school, and his dad, who went there years before, tells Zack the stories of the haunted janitor’s closet, the specter of a dead crossing guard, and the Donnelly brothers, who perished in a suspicious fire. Dad doesn’t know that Zack has already met the Donnellys’ ghosts, who have warned Zack that there is an evil zombie under the school. Zack also learns that while zombies are usually content eating corpses, if they happen to bite someone who isn’t dead, that person also becomes a zombie.
Before midterms, Zack is dealing with two zombies, while trying to protect a friend whose curiosity has put him on the zombies’ menu. 
Once again Chris Grabenstein proves his mastery of frightening and funny tales. Young readers, especially reluctant ones, have found inspiration in his quirky characters and deadly situations.