I looked at not long ago and I was greatly embarrassed — I thought it was very labored. I asked Heller when I interviewed him if he had used a thesaurus. He said, “Oh yes, I used a thesaurus a very great deal.” And I use a thesaurus a lot too, but not looking for a fancy word for “big.” I use it so I can vary the rhythm of what I’m writing — I want a synonym that’s three syllables, or one syllable. It’s a terrific aid to euphony, and everybody has their own idea of euphony. But the idea of plucking an obscure word out of a thesaurus is frivolous, I think.
Heller began the novel when he was 30, and published it when he was 38. There are show-offy words here and there -- and whole chunks of it seen overwritten -- but it's an extraordinary novel, and even more so for being a first novel.