Yeah, good luck with that. I would say going from book 2 to 3, and 4 to 5 will test your resolve. Book 3 - wasteland - ends with a cliffhanger but I didn't like that book so that's when I took my 1st break to read a different novel.
I wish I still had dark tower books to read 1st time, it's so easy to get drawn in to that world.