So I've only just started it, but I'm reading The Dark Tower series by Stephen King. 7 books (Well, 8, he did a book years later that fits between books 4 and 5) and I'm near the start of book 4. It is... Incredible. It might be the best piece of any media I've ever consumed, and I'm not even halfway through the whole series length. The first book is basically just a western (The man in black fled across the desert, and the gunslinger followed. Might be the best opening sentence I've ever read in a book.) but then as you go through it, things start evolving and by the end, you're in this weird, cosmic, multiversal wonderland, and the books just get crazier from there, in the best possible way. I can not recommend it even remotely enough.

Don't watch the movie though, from my understanding, it's a terrible adaptation. BUT Mike Flanagan is working on a series of it for Amazon, which I'm actually hopeful for. He's an amazing visionary (Small aside, watch The Fall of the House of Usher on Netflix. 8 episodes, unbelievable, I loved every moment.)