What is the author's style in The Killer Inside Me by Jim Thompson?

The story is based on a very convoluted storyline with Lou at the heart of it. Lou is demented and the story is written as a first-person account from Lou's perspective. Lou is schizophrenic, chronically paranoid and mentally unstable. Based solely on the fact that the story is being told by Lou, the story is not presented in a straight-forward style. The storyline races from one thought to another and sometimes seems to make little sense, in keeping with Lou's illness and attitudes. Lou is disorganized and focuses often on facts that he believes to be true. This often leads the reader into trains of thought that are not true. The words used are fairly straight-forward and most readers will have little trouble understanding the individual words, though some of the thoughts are difficult to understand. There are some points that are left to the interpretation of the reader, such as the statement that Lou makes regarding his murder of Amy Stanton in which he says that she might have committed suicide. There is also some repetition that may become annoying to some readers. For example, Lou says several times that he killed Amy Stanton on April 5, 1952, and then goes back to explain some prior act. He does this on several occasions, each time saying that he is getting ahead of himself and has something else to tell before he gives the details of that murder.