The novel to which Unca Jim is referring is QB VII. All first-person accounts were put in ALL CAPS, while the regular narrative was in ordinary sentence case. (It wasn't exactly alternating chapters, but it probably amounted to a little less than half of the book in ALL CAPS.)
It's an interesting book, and was a giant seller in its day (1970). It's about a libel suit filed by a Polish physician against an American novelist: the physician returns from charity work in an isolated community to find that the novelist has written a best-seller which identifies him (the physician) as a collaborator with the Nazis.
The physician, a Polish Catholic, is a survivor of a concentration camp, but the memories he presents IN ALL CAPS are of a man doing his best to help his fellow inmates while doing what he can to resist the authority of his imprisoners. And yet, in the narrative itself, he comes off as an anti-Semite and a bit of a crazy.
Meanwhile, the author's memories IN ALL CAPS are of his desire to live up to his war-hero older brother's example and to fight for the dignity of the Jewish people. And yet, in the narrative itself, he comes off as a bit of a crazy and an attention-seeker.
I think that Uris's point with the ALL CAPS stuff was to show the difference between the ways people present themselves and the ways other people perceive them. I'm not sure that it works--like Unca Jim, I had trouble reading the CAPS. And if Uris had not been the gigantic megaseller blockbuster author that he was at the time (Exodus had sold about a kajillion copies), I'm sure some editor would have told him to figure out something less annoying.