Mara Rockliff is the author of many books for children, including the Orbis Pictus Honor Book Mesmerized and Anything But Ordinary Addie, both illustrated by Iacapo Bruno; Around America to Win the Vote, illustrated by Hadley Hooper; Doctor Esperanto and the Language of Hope, illustrated by Zosia Dzierzawska; Jefferson Measures a Moose, illustrated by S. D. Schindler; Chik Chak Shabbat, illustrated by Kyrsten Brooker; and Me and Momma and Big John, illustrated by William Low, a Charlotte Zolotow Honor Book and Golden Kite Award winner. She lives in Pennsylvania, USA, with her family.

Giselle Potter and her sister, Chloe, traveled a lot with their parents' puppet theater. They often had just each other for companionship and therefore became very close. So Potter feels so lucky to have two daughters who are also very close. Watching their relationship, she is reminded of the unique, unmatchable bond of sisters. Potter has illustrated more than thirty children's books, and many of the books she both wrote and illustrated are either about or inspired by sisters.