I too love this series, but having bought all as p-books, I just can't justify buying for reader - they are far from "quick" reads, and I like to sink into them, in a very comfy chair, and concentrate a bit, aided by some malt perhaps, so it takes (me) quite a while to get through them, and enjoy them again.
And they are one of those works that somehow seem more at home on paper - Sorry to blaspheme here.................