Kate Mayes is the bestselling author of the picture books Daddy Cuddle and Mummy Cuddle (illustrated by Sara Acton), The Bum Book, The Christmas Bum Book and The Easter Bum Book (illustrated by Andrew Joyner), Count My Kisses, Little One and Count My Christmas Kisses (illustrated by Tamsin Ainslie and written as Ruthie May), and Stew a Cockatoo: My Aussie Cookbook (illustrated by Leigh Hobbs and written as Ruthie May), and is a contributor in the children's poetry book A Boat of Stars. She lives in Sydney, Australia, and works in the book publishing industry.