About the Book: Only the Good Spy Young by Ally Carter is the fourth book in the bestselling Gallagher Girls YA spy series, following Cammie Morgan as she faces her most dangerous mission yet at an elite boarding school for spies. When she discovers that a trusted ally may be a double agent, Cammie must navigate deception, espionage, friendship, romance, and dangerous enemies while questioning who she can trust. Packed with action, mystery, adventure, and teenage romance, this fast-paced novel is perfect for fans of XO, Kitty and young adult spy fiction.