Marilyn Sadler is a children's book author, television producer, and screenwriter. Among the dozens of books she has written are the bestselling Random House Beginner Books It's Not Easy Being a Bunny, Honey Bunny Funnybunny, It's Better Being a Bunny, and Bunny with a Big Heart. Her picture book Zenon: Girl of the 21st Century inspired the classic Disney Channel movie of the same name. Ms. Sadler's work has received many honors, including an IRA Classroom Choice Award and a Parents' Choice Award.

Roger Bollen (1941–2015) was a writer and illustrator of the Animal Crackers syndicated comic strip. He also illustrated more than 50 children’s books with Marilyn Sadler, including titles featuring P. J. Funnybunny and Alistair’s Elephant.