I'd Tell You I Love You But Then I'd Have To Kill You by Ally Carter

book 1 in the Gallagher Girls series

The Gallagher Academy for Exceptional Young Women is a fairly typical all-girls school—that is, if every school teaches advanced martial arts in PE, chemistry always consists of the latest in chemical warfare, and everyone breaks CIA codes for extra credit in computer class. So in truth, while the Gallagher Academy might say it’s a school for geniuses what they really mean is spies. But what happens when a Gallagher Girl falls for a boy who doesn’t have a code name?
 
Cammie Morgan may be fluent in fourteen languages and capable of killing a man in seven different ways (three of which involve a piece of uncooked spaghetti), but the Gallagher Academy hasn’t prepared her for what to do when she meets an ordinary boy who thinks she’s an ordinary girl. Sure, she can tap his phone, hack into his computer, and track him through a mall without him ever being the wiser, but can she have a regular relationship with a regular boy who can never know the truth about her? Cammie may be an elite spy in training, but in her sophomore year, she’s doing something riskier than ever—she’s falling in love.

This book is probably for girls from age 10 to 13.
Like this book? Read the series,book 2 Cross My Heart And Hope To Spy ,book 3 Don't Judge A Girl By Her Cover,book 4 Only The Good Spy Young, book 5 Out Of Sight And Out Time and finally book 6 United We Spy.

Comments:
I really like this series. I'm on book 3 and I can't stop reading it. -bella