This is Class-A by Robert Muchamore. It's the second book in the cherub series and i highly recomend these books for anyone aged 11-15! they are about a boy who gets recruited to be a cherub agent (cherub is a secret organisation of spys working for the goverment) and the books are all about his missions and are really good!
apologies for the none amazing blip! but it was one of those 10 o'clock-at-night-in-a-hurry blips :P