Longer Books! [Question of the Day]

What's one book that you were sorry to reach the end of; one that you wish had gone on for twice as many pages?

Oh, I could list so many. But here are just a few:

1. The Hounds of the Morrigan
2. Watership Down
3. The Lions of Al-Rassan (Thanks, Tia!)
4. The Neverending Story (If only it would live up to its title! But its point is that life is the best story, so I suppose I shouldn't complain.)
5. A Man in Christ (the only non-fiction I'm seriously listing)
6. I almost want to list Anathem, but that book was definitely long enough (at 928 pages) even though I wanted the story to keep going. 1,856 pages would be far too many.
7. I also kind of want to list Letham's Trinity, because I got so much out of every chapter of that book, but as above, the book was long enough (800+ pages), and it would have been seriously demoralizing to take 8 years to finish a book. Four years is long enough.
8. Tia's novel!!! Only half of it was finished so of course when I got to the end of it, I was quite sorry, and wished for the other half of the pages...
   

Suggestions for fiction I should read are quite welcome!