For the last two or three weeks I've been reading (actually re-reading - third time, I think) Diana Galbadon's Oultlander series; books two & three are about 1000 pages each, and I have the rest of the series (except for the latest, which doesn't seem to be out yet) to go. No boredom in sight!
For those who haven't read Gabaldon's books: they're somewhere between science fiction, fantasy, and history - time travel in the 1700's. I love her writing style, and her impressive inclusion of the history of Europe and "the Colonies", as well as the medical knowledge, or lack thereof, at the time. Amazing research!