Pride and Prejudice (thanks, HarryT!).
I've tried to read it 2 or 3 times in years past, but never managed to make it past the first few pages. For some reason, this time I can't wait to get home from work to read some more of it.
I didn't realize until today, when I was telling a friend about the book, that it's opening sentence is considered to be one of the most famous ones in English literature.