4 ideas
Dix Steele, a former WWII airman drifting in postwar Los Angeles and posing as a novelist, is secretly strangling young women on foggy nights. He looks up his old flying buddy Brub Nicolai, now an LAPD detective on the case, and keeps pumping him for details of the investigation. Brub's wife Sylvia and Dix's lover Laurel Gray sense that something is wrong with him, and their suspicion helps the police set the trap that ends his run.
The reader knows the killer from the first pages and is locked inside his close-third perspective, hearing his self-pity and contempt as ordinary thought. The tension comes from waiting for the people around him to see what the reader already sees. Because his rationalizations sound fluent from the inside, readers catch themselves half-inhabiting his logic, and that complicity is the book's real disturbance.
Brub's wartime bond with Dix makes him slow to suspect his friend, while Sylvia and Laurel pick up on small tells: a watchful stare, flashes of anger, too much curiosity about the murders. These women have had to watch men carefully to stay safe, and that habit becomes accurate perception. Charm works on those inclined to trust the man, and fails with those trained to watch what he does.
As a pilot, Dix had status, purpose and license to kill. Peacetime leaves him dependent on an uncle's allowance and resentful of a world that no longer defers to him. He frames his grievance as women's rejection, and strangling becomes his way of seizing back the control and dominance he feels owed.