Complex sentence: Mayhar has written over 60 books ranging from science fiction to horror to young adult to historical to westerns; with some work under the pseudonyms Frank Cannon, Frances Hurst, and John Killdeer.
Split into simpler sentences: Mayhar has written over 60 books ranging from science fiction to horror to young adult to historical to westerns. She has used the pseudonyms Frank Cannon, Frances Hurst, and John Killdeer.