The book doesn't have to be published this year. Just something you read this year.

I tend to keep a lot of my books, since it is relatively simple to do so. My favorite for 2009:

The Go-Between, by L P Hartley. It has the semi-famous, and memorable, first line "The past is a foreign country: they do things differently there." I read about this first line several times before actually reading the book.

It's one of those dreadfully sad loss-of-innocence books set in England about 100 years ago that just does it right.

Honorable mention to Trenton Lee Stewart's Mysterious Benedict Society for the first 80 pages, a fabulous example of an entrance exam with odd rules.

I do recommend logging the books you've read because it's really neat to look at at the end of the year--I wish I would've done so more rigorously, as this is the first year I've really done so. It feels pedantic to do so but even having the list at the end of the year is great, to look back and forward.