Joseph Helgerson lives next door to Theodore Wirth Park, where he often hikes. His book The Lost Galumpus is the first time he's written about that park's remarkable residents. He's previously written about river trolls (Horns & Wrinkles) and talking crows (Crows & Cards).
Nicoletta lives and works in San Marino, Italy. Awarded with the Andersen prize, "baia delle favole" as best Italian illustrator of the year in 2001, Nicoletta has also received the silver medal from the Society of Illustrators of New York.