Gischler (Go-Go Girls of the Apocalypse
) populates a world of intrigue with supernatural creatures in this highly entertaining novel. Allen Cabbot is saved from flunking out of graduate school by the extremely difficult Prof. Evergreen, who invites him to join a research project in Prague. Almost immediately, Allen finds himself tangling with Battle Jesuits, a Society of Witches and a vampire, and he learns that Evergreen’s real goal may be the philosopher’s stone. The feisty ghost of 16th-century alchemist Edward Kelley serves as narrator, complaining about the picture on his Wikipedia entry while explaining the history behind Allen’s adventure. While the characters lack depth, even the villains are approachable and likable. Dan Brown fans who don’t mind a little humor and magic mixed into their thrillers will enjoy this charming tale. (Sept.)