Watch out! The new girl in town, Vivian, wears a bat T-shirt and bat earrings. Suddenly, there are bats flying all around at night. Does she have something to do with them? Is she really . . . a vampire? Full color.

Michelle Knudsen is the author of many books, including the fantasy novels The Dragon of Trelian and The Princess of Trelian. She is also the author of the New York Times bestselling picture book Library Lion, illustrated by Kevin Hawkes, as well as the picture books Argus, illustrated by Andréa Wesson, and Big Mean Mike, illustrated by Scott Magoon. Michelle Knudsen lives in Brooklyn, New York. Amy Wummer has illustrated more than 50 children's books. Amy and her husband, who is also an artist, live in Pennsylvania.