There’s loads I’ve gone back to and read numerous times, and a great many I’ve only read once or twice.
Those I keep going back to include everything by William Gibson, a great many of Roger Zelazney’s books, especially Today We Choose Faces, Roadmarks and Damnation Alley, which I’m reading again at the mo’ as an ebook.
Most of Larry Niven’s Known Universe books, Neil Stephenson’s Zodiac, Snow Crash, Diamond Age,
Iain M. Banks’ Culture series, and loads of others over many years, some, like Today We Choose Faces, and Niven’s Time Out Of Mind probably several dozen times, because, and this is key, they’re all pretty short!
Not like today, where an author feels it’s not worth turning in a manuscript unless it goes to 600 pages, and it’s part of at least a trilogy. Nobody writes short stories or novellas any more, sadly; there’s a lot to be said for brevity.
The short version of Damnation Alley is just as good as the expanded novel, and Arthur C. Clarke wrote Against The Fall Of Night, then later revised and expanded it as The City And The Stars. I’ve read both, any number of times, and I enjoy them both, equally.
And neither are very long!