I don't look for anyone to say this is a great novel, although I do think it's a fine, fun read. But what I think is most interesting is that the character of Annie is so clearly a portrait of Brando and that so much of him gets into it.
Brando clearly was imagining himself as that person. There are several aspects of it that fit with Brando very well; that kind of loner, interested in sailing and the South Seas, drawn to Asian women and eating and drinking.
The character of Annie Doultry is plainly a self-portrait of Brando. There are transcripts of conferences he and Cammell had, and Brando did a lot of improvising, playing the Annie Doultry character. Plainly he saw this as a part that he might play in a movie himself.