The final book was okay. It sort of had two endings. I was okay with both of them. The first ending left things up to your imagination. If you wanted to you could keep reading and get an actual detail-filled ending. I think I liked the first ending better. Stephen King was in the last book. I found that completely annoying (again). He had an explanation at the end of the book, but no, I didn't buy it.
Now that I have read the entire series I plan to finish reading the graphic novel series. I think Ross has all but one of them electronically. That will be a new experience. I've never read a book or graphic novel on the computer. Ron Howard is interested in turning the series into movies or a TV miniseries. I'm not really interested in that at all, but I will most likely see it if it ever comes to fruition (Universal just backed out of production).
I still highly recommend the first novel in the series: The Gunslinger. I also recommend the first in the graphic novel series: The Gunslinger Born. I'll be sure to blog about the rest of the graphic novel series.