My friend Julie recommended Ally Carter's I'd Tell You I Love You, But Then I'd Have to Kill You as a really fun read. She was so right!
Sixteen-year-old Cameron "Cammie" Morgan is a spy-in-training. She, along with about 100 other girls, attend the Gallagher Academy, a special preparatory school that teaches the girls all they'll ever need to know about being spy. (The descriptions about their classes are farfetched and yet so fun. Carter does a good job of making everything believeable--you can almost swallow the whole story without any hiccup. Since I love spy stories, I happily accepted everything she said.)
When Cammie meets an ordinary guy while out on a mission, she falls for him. But is he a good guy? Cammie and her friends do a bit of recon work on him (which, again, is really funny and entertaining) to make sure he's alright. He appears to really like Cammie--but can the super spy and the ordinary boy actually date?
I really like this book. It's fun, full of hilarious asides about spy escapades and even my brother admitted it looked good. It's an easy read that's thoroughly entertaining.