Macdonald later described his third novel, Blue City, as "a tough thriller in the Spillane tradition", although The Chicago Sun noted that he was in a different league from Mickey Spillane. Publicity for the novel linked the author's name with James M. Cain, Dashiell Hammett and Raymond Chandler, a comparison deprecated in the mixed reviews that the book received at the time. Macdonald himself later said in an interview that Hammett was a particularly strong influence on the novel; "I imagine I might never have written hard-boiled detective stories at all if it hadn't been for Hammett". Others have commented on the likeness between Macdonald's 'Blue City' and the 'Poisonville' of Hammett's Red Harvest. The portrayal of the novel's unnamed Mid-Western small town, lying in the shadow of Chicago, is centered mostly on the disadvantaged who live in it and differs from the up-market Californian scenarios of the Lew Archer novels that Macdonald was yet to write. In a 1952 letter to his publisher, he explained that he had in mind "a town where I had suffered, and several of the characters were based on people I hated." It is from this that the book's anger and political stance derive. The protagonist is narrator throughout, but will occasionally diverge from talking tough into what Macdonald's biographer describes as "civics lectures" or he overdoes literary reference. The particular target of his anger is small-town pettifoggery. The self-congratulatory tabloid editorial justifying anti-union violence or the list of books suppressed in the library from which "it was somehow comforting to know that the good people of the town … were protected against the lubricity of Rabelais, the immorality of Flaubert, the viciousness of Hemingway, and the degradation of Faulkner." Reviewing the book, Nelson Algren praised the over-all clipped descriptive style: "Kenneth Millar never uses two words when one will do; and when he wants you to see a thing, you see it." A later commentator looked beyond thriller conventions and discovered that "Millar wanted to do in prose what jazzmen did in music". Here he was only following Macdonald himself, who had said in an earlier interview that "the imagery and rhythm and movements of jazz had a lot to do with forming my style in my early books. It's quite obvious in a book like Blue City." He also noted then that Jack Kerouac's "jazz-prose" was written later and more diffusely. There was no direct influence.
Plot
Twenty-two-year-old John Weather has returned from the army, having served in the European Theater in the Second World War, only to find his estranged father had been shot two years previously. John had known his father as a prominent businessman and politician and now learns that he was a leading factor in the corruption of the town. Everyone seems more than happy to let his murder remain unsolved and, as John tries to uncover the murderer, he finds himself up against and manhandled by thugs in the pay of Roger Kerch. Kerch is a blackmailer who has taken over his father's slot machine franchise and seems to have a hold over his step-mother, Floraine, whom his father had married while John was young and living away from home. Finally, with the help of Carla, a hostess at the Cathay Club, John gets ahead of those trying to prevent him uncovering the truth. After Kerch has killed his step-mother, and John is in line to inherit his father's assets, he gains the co-operation of Ralph Hanson, the police inspector in charge of the case, and Freeman Allister, the ineffectual reformist mayor. Kerch and his surviving associates are jailed, while Allister, the real murderer of John's father, is shot by his mistress.
