I loved the Dark Tower series. The Gunslinger, the first book, is still my favorite, of the group. It is a massive read for all of them. But, if you like King, you will like the series as it mixes in everything from his different styles of writing.
I haven't that much time to read lately, as I have been reading transportation documents and studies for work, but I started reading the Road by Cormac McCarthy. I am just a few pages in, but like it so far. I have right behind it No Country for Old Men.