Day 5 is "a book that makes you happy." Well we know I love Twilight, of course. And it makes me really happy.
But the more I think about this topic, I don't think I much read happy books. I like emotional tear jerkers and intense mysteries.
I can think of one series that can me belly-laugh-out-loud and that's the Stephanie Plum series by Janet Evanovich.
If you need a laugh start with One for the Money and I don't think you'll be disappointed!
Book pics from Goodreads.