Book 5 in the Gallagher Girls Series
I really like this series. For once in a series written for teens, the mother is not dead or somehow unavailable. The mother is a strong, smart, independent woman and very much involved in Cammie's live and the Dad is missing/gone in the series. It is a refreshing change. Cammie goes to a super secret, covert spy school for girls from 7th to 12th grade. The girls are smart, brave, athletic, and good friends. There is a love interest for Cammie, but it doesn't take over the story. Cammie still goes on adventures, still does her own things, still is true to herself. To top it all off the story line is interesting. A good mix of action/adventure and friends/relationship.