I just read I'd Tell You I Love You But Then I'd Have to Kill You by Ally Carter.  The book is well written, and fun.  Cammie Morgan goes to boarding school.  It may look like a school for snooty rich girls on the outside, but really it's a school to train female spies!  The opening grabs you right in and immediately sets the tone for the rest of the book.  I know I'll be checking out the sequel.

Read about author Ally Carter at her website:  http://www.allycarter.com/