Stephanie Calmenson is a New York-based author who's written over a hundred books for children, including several Fraggle Rock and Sesame Street books. Besides her author credits for Disney and the Baby-Sitters Little Sister series, Calmenson has also written many well-acclaimed original books, such as Dinner at the Panda Palace, Rosie, a Visiting Dog's Story and Jazzmatazz.
She occasionally writes under the pseudonym Lyn Calder. 
- Waggleby of Fraggle Rock (1985)
- First Times (1986)
- Gobo and the Prize from Outer Space (1986, as Lyn Calder)
- Sesame Street ABC (1986)
- First Steps (1998)