Faulkner wrote one good book: The Reivers", which is also a great movie. Having read that one, I though I'd discovered a great author, but unfortunately, his evil twin took over with the rest of his output.

Dickens is really a great writer, but you have to wade thtough the first third of any of his books before they get really good. He was paid by the word, so his books are unneccessarily long.

Stephen King was good in the beginning, then got tired. Then he perked up with "Misery" and "Dolores Claiborne", then got tired again.

The worst books are the ones that make really good, compelling reading until the end, when you realize that you've just been manipulated by a really good writer of crap. "A Stone for Danny Fisher" by Harold Robbins is a good example. I couldn't put it down.
There is an art to writing trash that very few authors are capable of. Robbins was one of those artists.