Paperback edition of the latest novel by new Children's Laureate, Malorie Blackman. Decades after a violent war destroyed much of the world, Kaspar has grown up in a society based entirely on peace. Weapons are now illegal, and an elite peacekeeping force called the Guardians ensure that this new harmony is maintained. But shortly after Kaspar graduates as a guardian, a ruthless band of rebels threaten the peaceful nature of the society...