Tom Wolfe disliked the movie version. A lot of the book was about getting into the minds of the astronauts and their wives. The movie version also messed with a lot of the narrative to fit it into 3+ hours. Test pilots who didn't become part of the Mercury Seven were featured in the book, especially Pete Conrad. However, a lot of his rebelling against the selection process was attributed to other candidates. I was also kind of disappointed that they didn't find some way to portray how he gift-boxed (complete with a ribbon) a turd when providing a fecal sample.