When a petty thief falls through a glass roof while fleeing from the police, it should have been the death of him. Instead, it marks the beginning of a whole new life. Soon he has become the most successful—and elusive—burglar in Victorian London, plotting daring raids and using London's new sewer system to escape. He adopts a dual existence to fit his new lifestyle, taking on the roles of a respectable, wealthy gentleman named Montmorency and his corrupt servant, Scarper.

Montmorency—the man leading a double life, torn between his two identities—returns in this gripping sequel to THIEF, LIAR, GENTLEMAN? Five years after giving up his life of crime in the London sewers, Montmorency is back. But his evil alter ego, Scarper, has returned too, pulling him back into a dark world of crime. Montmorency's old friend and fellow government agent, Lord George Fox-Selwyn, fights to rescue him from disaster. The two men are needed now more than ever, as a rash of bombings threaten to destroy England's rail lines. And only Montmorency's intimate knowledge of the London underworld can save the city...

Montmorency, the man who leads a double life as both a criminal and a gentleman, is back for his most thrilling adventure yet in the final installment of the Montmorency trilogy. As the nineteenth century draws to a close, war is in the air, and influenza is sweeping the globe. After twenty years as a gentleman, Montmorency is glad to be free of Scarper, his wretched alter-ego. However, when Montmorency's young friend Frank finds himself caught in the middle of a murderous political plot, Montmorency may have no choice but to call upon none other than Scarper for help. Follow Montmorency, Fox-Selwyn, Dr. Farcett, and a whole new generation of characters on their travels from London to Scotland, Italy and America.

A dark tale of vengeance and madness takes Montmorency on his next crusade.... As Queen Victoria lies dying, Montmorency and his friends are already in mourning, and determined to track down the killers who have wrecked their lives. It's personal obsession, but Montmorency has public duties too, and when the two collide, he must decide which comes first. Can he stop Doctor Farcett's slide into insanity? And how can he teach a new generation to forgive when the lust for revenge is eating away at his own soul? The fourth Montmorency adventure takes him on a race across the globe with a mission of revenge for the death of his dearest friend Lord George Fox Selwyn.

Late 1901: After the cataclysm of the Paterson fire, Montmorency faces the most difficult challenge of his life. To protect the people he loves most, he is forced to do things that turn them against him. His own death may be the price of a greater good. But, trapped in a net of lies and secrets he cannot control, Montmorency must face that danger alone. 'Some people just write very well. They have a way of putting words on the page that immediately communicates with the reader, and Updale certainly has that talent in spades.' (The Guardian)