Regeneration is a historical fiction novel set during World War I. It documents characters based on real people and their experiences with shell shock and recovery at the Craiglockhart Hospital.

This novel explores the psychological effects of war on soldiers and the attempts at recovery in a medical setting. It provides a deep insight into the human mind during times of extreme stress and trauma.

Slough House is Jackson Lamb's kingdom; a dumping ground for members of the intelligence service who've screwed up: left a secret file on a train, blown a surveillance, or become drunkenly unreliable. They're the service's poor relations - the slow horses - and bitterest among them is River Cartwright, whose days are spent transcribing mobile phone conversations.

But when a young man is abducted, and it's threatened that he'll be beheaded live on the Internet, River sees an opportunity to redeem himself. Is the victim who he first appears to be? And what's the kidnappers' connection with a disgraced journalist?

As the clock ticks on the execution, River finds that everyone involved has their own agenda...