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...