In Volume 1 of Mark Danielewski's (proposed) 27-volume epic, The Familiar, a girl finds a cat. (900 pages.)
In Volume 2, the cat (and the girl, named Xanther) are hungry. They eat and don't eat. Get sick, get better. (Around 800 pages.)
In Volume 3 — the newest, called Honeysuckle & Pain — the girl tries to find a name for the cat. Can't. Plays some video games. Gets a pair of strange sunglasses. Let's call it 743 pages. Not the entirety of the book, but most of it.