Which fantasy fiction author wrote The Black Wheel along with co-author Hannes Bok?
The Black Wheel: The Black Wheel is a fantasy novel written by A. Merritt and Hannes Bok. The Black Wheel:  Merritt had completed the first seven chapters, roughly 20,000 words, before his death in 1943. A. Merritt: Abraham Grace Merritt (January 20, 1884 – August 21, 1943) – known by his byline, A. Merritt – was an American Sunday magazine editor and a writer of fantastic fiction.
Abraham Grace Merritt