Other Worlds of Isaac Asimov - It’s kindle time...
http://www.asimovreviews.net/Stories/Story135.html
Thanks for the link Civ
The Wendell Urth mysteries are few in number, but more entertaining than Asimov usually is; I think he wrote them under a pen name to avoid being associated with the detective genre, and maybe because he still had hopes of becoming successful again. :’)