In this thrilling and bestselling series Stuart Gibbs called "a must-read" from Edgar Award winner James Ponti, five kids from all over the world become real-life spies--perfect for fans of Spy School and Mrs. Smith's Spy School for Girls. Books four through six are now together in a collectible hardcover boxed set Operating out of a base in Scotland, the City Spies are six kids from various parts of the world. When they're...