Just finished the last Dark Tower book. Literally just, on my commute into work. Not sure if I like it or not right now. The story sure, but the ending. Last I heard they said the movies will be a continuation of the story so we'll see how that goes I guess.
I liked Wolves, thought it was pretty cool. Keep in mind I never read Salem's Lot so I don't know anything about that portion of the story, or didn't going in. I thought the weakest point was in Song of Susannah and all the weird inclusion of King as a character. I don't know exactly why I don't like that, I just don't. And all the weird mutants and bird people and whatever, it just kind of goes off the rails into some other shit. The stuff with Mordred and the Crimson King also just kind of seemed tacked on, like a not fully realized antagonist in both cases added just for lulz.
Yeah, mixed bag for sure. I will have to reread Insomnia because I don't remember the ties to the Dark Tower at all.