The Great Gatsby
Me during the first 100 pages: The prose is absolutely top notch but it doesn't feel like much is happening.
Me during the next 40 pages: Ooh, drama! This are getting interesting.
Me during the next 20 pages: Wait... what?
Me during the last 20 pages: What? WHAT. WHAT.
Me finished with the book: WHAT. WHAT DID I JUST READ.