In between Ronald Firbank and Piers Anthony who is most famous for his set in the fictional realm of Xanth?
Piers Anthony: Piers Anthony Dillingham Jacob (born 6 August 1934 in Oxford, England) is an English American author in the science fiction and fantasy genres, publishing under the name Piers Anthony. Piers Anthony:  He is most famous for his set in the fictional realm of Xanth.
i don't know