This is one of the worst works of scholarship I have ever read. The book consists mostly of plot summaries, badly written ones at that. Jones needs to re-read (read?) The Elements of Style.
As for the theory--whew! It's awful. Jones attempts to provide a Freudian reading, which would be fine if he'd bothered to understand Freud first. But he didn't. In the Works Cited, he lists only a couple works by Freud, and I believe that's because that's all he read.
Jones shows no understanding of Freud. He seems to argue that Kerouac read about Freud's theory of the Oedipus complex and then consciously tried to organize his novels around that theory. Of course that's ridiculous, but Jones seems to have no clue that the complex operates unconsciously. It's absurd to argue that Kerouac chose to apply it.
It's transparent that Jones doesn't believe the very Freudian theories he (superficially) presents. Generally, he avoids referring to psychoanalysis at all, focusing instead on plot summary and occasionally popping in to point out hostility to a father figure, etc. The theory is NEVER discussed in depth, just referred to in an offhand fashion.
Jones often claims that Kerouac's novels were modelled on the works of other writers, but he offers no support for these claims. He seems to believe that pointing out parallels constitutes evidence.
This writer is in over his depth.