@mav4ick,
When I read The Mosquito Coast, I quietly decided that the main character was a spiritual cross between me and a friend of my ex-husband. I just gave the book to former and asked what he thought of the main character after he read it. He said that he was a combo of me and his friend.
When the movie was announced, I wanted Robert Duval to play the part. Duval is someone I could have seen in the role. Actually, given the history, Ford did not disappoint.