Rachel Ruth Cosgrove Payes,[1] also known as E.L. Arch and Joanne Kaye (11 December 1922, Westernport, Maryland – 10 October 1998, Brick Township, New Jersey) was an American genre novelist, and author of books on the Land of Oz.
Trained as a research biologist, she worked as a medical technologist at various hospitals.
[3] Her first book, The Hidden Valley of Oz, was published by Reilly & Lee in 1951.
The bulk of Cosgrove's work consisted of historical romance novels, many published by Playboy Press, one under the name Joanne Kaye.
She also wrote science fiction novels for Avalon Books under the name "E.L. Arch", an anagram of Rachel, as well as shorter sf and fantasy under her own name.