In a Lonely Place by Dorothy B. Hughes

Los Angeles, the late 1940's. A serial killer stalks the foggy streets at night ...

Dix Steele, a former fighter pilot, moved to L.A. after the war, looking for a new life. But the city is gripped by fear of a murderer in its midst. Dix, however, is not scared. And when he bumps into his old friend Brub, now a detective on the trail of the culprit, he is excited to follow the police's progress. A dark and terrible truth is revealed, in a noir novel like no other.