Cormac McCarthy's Border Trilogy. As with some of his other work, the punctuation can be a challenge and the prose can sometimes border on the ponderous, but I'm enjoying it. Currently about half way through.
I have a Random House audiobook version of the trilogy read by Brad Pitt. His Spanish pronunciation isn't great (although better than mine) but I enjoy his quiet voice and slightly careworn delivery. It's abridged, though, and I wanted to read the whole work.
The Recorded Books recordings of The Road and No Country for Old Men narrated by Tom Stechschulte are very good too.
