Two hilarious Diamond Brothers investigations in one volume by the number one bestselling author of the Alex Rider series, Anthony Horowitz. Meet the Diamond Brothers, the world's worst private-detective agency, in this Chandler-esque spoof from the creator of the bestselling Alex Rider series. Life as the younger brother of the world's most defective detective can be tough  and these two adventures will test Nick to the full. What connects them? Murder! And if the Diamond Brothers don't play their cards right, they could be next.