Idun and the Apples of Youth (Thunder Girls #3)

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 and is online at JoanHolub.com.

Suzanne Williams is a former elementary school librarian and the author of over seventy books for children, including the award-winning picture books Library Lil (illustrated by Steven Kellogg) and My Dog Never Says Please (illustrated by Tedd Arnold), and several chapter book and middle grade series. She also coauthors the Goddess Girls and Thunder Girls series with the fantastic Joan Holub. Visit her at Suzanne-Williams.com.

Toby Allen is a freelance illustrator from the UK, specializing in character design--for publishing as well as games--and children's book illustration. He has also worked as a 2D game artist for mobile and board and tabletop games and contributed to a variety of other projects that span from classical music to mental health.