Stephen King.... Bag of Bones, 'salem's Lot, Pet Sematary, etc.
When I read "Bag Of Bones" I thought he'd never end. I mean amazing story but waaaaay too long. "Pet Sematary" is I believe the only book King regret to have written. "Salem's Lot": great classic.
One trilogy I like:
By James Clavell.
Anything by Hermann Hesse
Esp: Siddhartha and Steppenwolf.
Yeah, it was rather long... But worth it in the end. In my opinion anyway. I can see why he regrets writing it. I always love reading those little introductions in his books with little side notes and bits and pieces of how the book came about, etc.
'salem's Lot actually took me a little while to get caught up in but once I was, I couldn't separate myself from it.
I'm now reading A Million Little Pieces or whatever by James Frey, even though I was begged not to by a friend from whom I borrow books from every once in a while.