This is book 1 of the CHERUB series except Lauren, and James are twins. They are both 11 years old and are starting basic training with Kerry Chang who is James best friend. You are Zoe Gray an Cherub agent from Australia. But you have to retake basic training even though you've been an agent for 3 years bc 11 year olds are required to. Your James, and Laurens cousin but they never knew about you.