Can someone please spoil the rest of The Dark Tower for me?

Got through the first 5 books. While I would like to know how it ends (in as much detail as possible) There was enough that was annoying me in The Wolves of Calla that I can’t see myself investing the time needed to Read the last two books.

So, in as much detail as you are inclined to give, I turn to you folks to let me know how it all turns out.

Final note: As this is a thread dedicated to spoilers I will assume that no boxes are needed.

Dark Tower VI

Dark Tower VII