RH
Robert J. Harris
Robert J. Harris is a Scottish academic and author, particularly of children's fantasy and historical novels, best known for his collaborations with Jane Yolen. He also designed the fantasy board game Talisman and its sequel Mythgardia.
Excerpt from Wikipedia, available under CC BY-SA 4.0.
Books

Artie Conan Doyle and the Scarlet Phantom
2019
ISBN 9781782506089