Heidi Elisabet Yolen Stemple grew up in Hatfield, Massachusetts, and after 18 years of living elsewhere, she has returned. She has also returned to the family business—writing children’s books—after working as a probation/parole officer and a private investigator.

Heidi is Jane Yolen’s daughter and sometimes writing partner. They’ve co-authored several books together, including their History Mystery series and Not All Princesses Dress in Pink.

They also worked together on the nonfiction middle-grade Bad Girls: Sirens, Jezebels, Murderers, Thieves, and Other Female Villains and their most recent picture book, You Nest Here with Me illustrated by Melissa Sweet. Heidi 'starred' in her mother's 1988 Caldecott-winning book, Owl Moon.

Eva Byrne is an artist who specializes in fashion illustration and children's books. She lives in the Irish countryside.