Depends on what you are after when reading.
Cormac McCarthy is a great writer, and helps put America on the map with regard to literature. We don't have much that can in any way compare to what Britain has produced. It's been so long and so many books ago, sorry I can't give you a detailed review. I remember liking All the Pretty Horses, too.
His work is dark and violent though, so if that is what you think you need to be reading, then read it. I read everything I could when I was young, including McCarthy. I wanted to understand everything in the world and the problem of evil in humanity. So I read everything I could. I didn't get an answer (or solution) until I began studying Orthodoxy.
For America literature, I recommend Ken Kesey One Flew Over the Cuckoo's Nest and all of Kurt Vonnegut, before McCarthy, because at least they will make you laugh out loud while you are reading. I like evil to be balanced with good, because the story of evil prevailing is a flat out lie and contrary to the Orthodox faith. So, it's a spiritual downer.
If you like that sort of sadistic puzzlement, read Jim Thompson, who has a spare and unique style, but does an incredible job with the character of a pyschopathic sheriff, like in Pop. 1280 and The Killer Inside Me. They made a movie out of another novel, The Grifters, that was pretty good.