Kathy MacMillan is a nationally certified American Sign Language interpreter, writer, teacher, librarian, and storyteller. She is the author of the board books Nita's First Signs and Nita's Day (Familius), children's nonfiction book She Spoke: 14 Women Who Raised Their Voices and Changed the World (Familius), the young adult novels Sword and Verse and Dagger and Coin (HarperTeen), and nine books for parents, librarians, and educators, including Little Hands and Big Hands: Children and Adults Signing Together (Huron Street Press).

Julia Castaño is a Spanish-born illustrator and professional dreamer. She graduated in Fine Arts in Madrid, where she lived and worked as an Art Director before moving to England to obtain her MA and become a children's book illustrator. Her shelves are filled with endless stacks of picture books and graphic novels. When she's not drawing, you can find her in her Brighton den, which she shares with three cats and a monkey.