Joan Holub has authored and/or illustrated over 140 children’s books, including the Goddess Girls series, the Heroes in Training series, the New York Times bestselling picture book Mighty Dads (illustrated by James Dean), and Little Red Writing (illustrated by Melissa Sweet). She lives in North Carolina

Tim Foley was born in Flint, Michigan, and since attending college at the Kendall School of Design, has made his home in Grand Rapids on the west side of the state.

A freelance illustrator for the past three decades, his work has appeared in magazines and newspapers around the world and books have included many titles in the bestselling young adult "Who Was" biography series, as well as Cooking for Wizards, Warriors and Dragons and the companion book, Drinking with Wizards, Warriors and Dragons.