Though "Destry" is basically pulp fiction, it's a sufficiently complex story -- morally and psychologically -- that it's a worthwhile read for almost anyone. The author, Frederick Schiller Faust, remains one of the most-prolific writers ever, having cranked out 25M to 30M words in his lifetime. He could write 20K words a week (12K over just a weekend), and he might have a short novel and the chapters of two serials published in the same magazine week after week.
The "modern" Western begins with Owen Wister's "The Virginian". Though it's a serious novel about male sexuality and whether killing another human being is ever justified, it became the model for the "cowboy as strong/silent type" story in which the chaste hero rides into town, cleans up the bad'uns, and then (depending on the writer's taste) either marries the schoolmarm, or decides he loves his horse more and rides off. This shallow distortion of Wister's work became the basis of many formulaic Western novels and films, up until about 1950, when so-called "adult" Westerns largely replaced them.
"Destry", published as a novel in 1930 after appearing as a magazine serial, is nothing like the kiddie Westerns unintentionally spawned by Wister. Harrison Destry is a badly flawed human being, and is punished for it by being sent to prison for a crime he didn't commit. He publicly threatens the jurors -- who ignore the obvious evidence and find him guilty simply because they don't like him -- to return and seek revenge.
Though "Destry" appears to be a conventional revenge melodrama, it is closer to a Bildungsroman, a story about a person's moral & spiritual progress. Destry eventually understands what a poor human being he is, no better than anyone else, and changes. Faust doesn't just /tell/ us this; he puts Destry in a situation that makes him realize that he's wrong about a lot of things and has to mature. The most-interesting aspect of his reformation is his recognition that he created his own enemies, and is at least partly responsible for the bad things that happen.
"Destry" is not "great literature", but Faust occasionally delivers simple and elegant scenic passages worthy of a "better" writer. The story's only real flaw is Faust's tendency to overwrite, which was commonplace when writers were paid a penny a word.
This is a book that will remain with you for a long time. Unhesitatingly recommended.