Candace Fleming is the author of more than twenty distinguished books for children including The Family Romanov: Murder, Rebellion, and the Fall of Imperial Russia, winner of the Boston Globe-Horn Book Award for Nonfiction, the NCTE Orbus Pictus Award, and a Sibert Honor, among other awards.

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.