Iona Archibald Opie was born in 1923. During the Second World War, she met and married Peter Opie. Together they became a renowned husband-and-wife team of folklorists with a particular interest in children's toys, games and literature, working from their home in Hampshire and conducting primary fieldwork all over the United Kingdom. Their remarkable collection of children's books and ephemera was purchased by the Bodleian Library in Oxford in 1988. They were the authors of over 30 books including The Oxford Dictionary of Nursery Rhymes (1952) and The Lore and Language of Schoolchildren (1959). Iona Opie lives in Hampshire.
Rosemary Wells, author and illustrator of several dozen books for children and young adults, was born in 1943 in New York City. She studied at the Museum School at the Museum of Fine Arts in Boston. Wells began her career in publishing, working as an art editor and designer first at Allyn and Bacon and later at Macmillan Publishing. Her first work, which she both wrote and illustrated, was Martha's Birthday, published in 1970. Her first work for young adults was The Fog Comes on Little Pig Feet, published in 1972. Wells is perhaps most famous for the Max series, beginning with Max's First Word, published by Dial in 1979. Although the primary audience for the series is very young children, the books appeal to the senses of humor of even small children. Wells says that the inspiration for these stories is her own children. Wells is the recipient of numerous awards including a Children's Book Council Award for Noisy Nora in 1974, the Edgar Allan Pie award for two young adult books, Through the Looking Glass and When No One Was Looking, and the Boston Globe-Horn Book Award for Shy Charles. Rosemary Wells is married to Thomas Moore Wells, an architect. The couple has two daughters.