As a boy, he spied for Sherlock Holmes. As a man, he must save the empire.

London, 1909: the British Empire seems invulnerable. But Captain Vernon Kell, head of counterintelligence at the War Office, knows better.

In Russia, revolution; in Germany, an arms race; in London, the streets are alive with foreign terrorists. Kell wants to set up a Secret Service, but to convince his political masters, he needs proof of a threat - and to find that, he needs an agent he can trust. The playing fields of Eton may produce good officers but not men who can work undercover in a munitions factory that appears to be leaking secrets to the Germans. Kell needs Wiggins.

Trained as a child by Kell's old friend Sherlock Holmes - he led a gang of urchin investigators known as the Baker Street Irregulars - Wiggins is an ex-soldier with an expert line in deduction and the cunning of a born street fighter. 'The best,' says Holmes. Wiggins turns down the job - he 'don't do official'. But when his best friend is killed by Russian anarchists, Wiggins sees that the role of secret agent could take him towards his sworn revenge.

Tracking the Russian gang, Wiggins meets a mysterious beauty called Bela, who saves his life. Working for Kell, he begins to unravel a conspiracy that reaches far beyond the munitions factory.

Fast paced, action packed, full of twists and violent, sometimes poignant shocks, The Irregular: A Different Class of Spy marks the arrival of a brilliant new writer.