I'd Tell You I Love You, but Then I'd Have to Kill You by Ally Carter

Cammie Morgan is the daughter of the Headmistress at the Gallagher Academy, a school that claims it is for genius girls. But behind it's twelve-foot, ivy-covered walls, Gallagher is really a school for training young female spies. Entering her sophomore year, Cammie and her friends are excited because this is the year that they get to enter Sub-Level 1, the underground rooms where Covert Operations is taught.

Little does Cammie know that soon she will be running the covert operation of her life as she meets Josh, a boy from town and falls for him. To him, Cammie is the child of religious zealots who are homeschooling her. As she tries to balance her two secret lives, while keeping them completely separate, Cammie soon realizes how impossible this task really is!

Filled with action, romance and quite a bit of humor, this light read is perfect, particularly after a grueling required reading assignment.