Is the kid supposed to be the coke addict in the book? Eddie was it? <-- Not at all a spoiler.

The cool thing about The Dark Tower is that it is supposed to be the universe that he refers to in many other books. While I've read a few of his books, I never went down that rabbit hole of reading every book that had references to the Dark Tower universe. I really liked the Dark Tower series when I read it. Wizard and Glass (#4) was my favorite.