Matt Phelan is the author-illustrator of three previous graphic novels: the Scott O'Dell Award-winning The Storm in the Barn, Around the World, and Bluffton, which was nominated for three Will Eisner Comic Industry Awards, including Best Graphic Album.

He is the author-illustrator of Druthers and the illustrator of many books for young readers, including Marilyn's Monster by Michelle Knudsen and The Higher Power of Lucky by Susan Patron, winner of the Newbery Medal.

Matt Phelan lives in Pennsylvania.

Michelle Knudsen is the author of many books, including the young adult novels Evil Librarian and Revenge of the Evil Librarian and the Trelian middle-grade fantasy series.

She is also the author of several picture books, including the New York Times best-selling Library Lion, illustrated by Kevin Hawkes. Michelle Knudsen lives in Brooklyn, New York