During the Thirties, L. Ron Hubbard wrote in just about pulp genre that existed. “Spy Killer”, from the April 1936 issue of FIVE-NOVELS MONTHLY, is a short novel of Oriental intrigue reminiscent of some stories I’ve read by H. Bedford-Jones. Two-fisted American sailor Kurt Reid is framed for murder when his ship docks in Shanghai. He’s helped to escape by a Chinese warlord who demands in return that Reid assassinate a mysterious Japanese spy. Throw in a beautiful White Russian adventuress and the equally beautiful daughter of a British merchant, each of them with agendas of their own, a few double-crosses, the Japanese army, and Reid is up to his neck in trouble. I don’t think this yarn is quite as good as the Westerns I've read by Hubbard, but it’s still pretty entertaining.
The scan of the original pulp issue is from the invaluable Fictionmags Index. It's from a damaged copy but the only image I could find on-line.