Junkie!
This was a PlanetMonk Kindle reprint of a 50s pulp novel. I was expecting tons of scary drug use but the whole “junkie” thing doesn’t really play a big part. There’s a murder and the main suspect is our protagonist’s girl, the titular junkie. This story oozes with smoky, drunk jazz atmosphere. I almost finished this one wanting to listen to jazz, but my willpower against annoying music is strong.