Black Friday, Paperback/Robert Muchamore

The fifteenth title in the number one bestselling CHERUB series Ryan is about to board a plane, knowing that the next twenty-four hours will change everything. His mission is to stop the biggest terrorist attack America's ever seen. Ryan works for CHERUB, a secret organisation with one key advantage: even a trained terrorist won't suspect that a teenager is spying on them. For official purposes, these children do not exist.