this book is great! its the fourth book in a series called CHERUB he's written, AND BY FAR THE BEST YET!! the whole series is based on a boy called James Adams and he's recruited to this place called CHERUB. it's an organisation that trains under 18's to be secret agents and stuff. now i no it sounds all a bit flying round on broomsticks type of thing, but trust me its not. i hate all that kind of stuff and he makes it sound genuinly real, also its about him and his mates , and thier personal life.i wont tell you what the killing is specifically about, apart from he goes on a mission, you'll have to read it for yourself to find out. but i would deffiently recomend it to anyone and the whole series!!