Meet the Diamond Brothers, the world's worst private-detective agency, in this Chandler-esque spoof by Anthony Horowitz, creator of the bestselling Alex Rider series. Tim Diamond is the world's worst private detective, but unfortunately for his younger brother Nick, the cases keep coming in. First a man run over by a steamroller and then a remote Scottish island where the guests are dying. Can Nick and Tim find the murderers before it's too late?

Anthony Horowitz (born 5 April 1955), is an English author and screenwriter. He has written many children's novels, including The Power of Five, Alex Rider and The Diamond Brothers series and has written over fifty books. He has also written extensively for television, adapting many of Agatha Christie's Hercule Poirot novels for ITV series. He is the creator and writer of the ITV series Foyle's War and the series Midsomer Murders.