One for the Money

Publisher's blurb:

Spine-Tingling Washington, D.C. Mythos Noir from the Casefiles of Langston Wright

You are Langston Wright: a scholarly WW2 veteran, fighting for room to breathe in wartime Washington under the shadow of the Jim Crow laws. Equipped with your smarts, your test tubes, and your determination to help people, your job is to scour the streets of the District and fix its toughest problems.

Rhino Jones is one tough cookie, and he makes it impossible to turn down his demand to find out who stole from him and killed his crew. This leads Langston into a blurred otherworld of corrupt businessmen and Nazi spies, and the deadly weapon prototype that they're all trying to get hold of.