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Rohan Gavin is an author and screenwriter based in London.

He combined his love of mystery, suspense and comedy to write his debut novel Knightley & Son, the Sunday Times Children’s Book of the Week, Boston Globe’s pick of the week, ‘full of suspense, intrigue and humour this is a modern day classic detective mystery’ (Guardian), ‘a young Holmes for our times’ (Daily Mail), ‘a rousing page-turner with one fault: It ends’ (Kirkus, starred review).


Darkus Knightley is a perfectly ordinary thirteen-year-old, apart from the name, his brainpower, his fondness for tweed, and the top secret files hidden upstairs. But when a stranger from the Department of the Unexplained arrives with news of his father, ordinary is over for good …

Alan Knightley was London’s top private investigator until he went into a coma four years ago. Now he’s woken up to discover his son has inherited the family talent—and their services are urgently needed. Is a bestselling book making people do terrible things? Could it be linked to a shadowy organisation known as the Combination? It’s clear to Darkus that two mega-brained investigators of the weird are definitely better than one. And it doesn’t get weirder than this.

The game is afoot for Knightley & Son.


London’s youngest detective is back … Darkus Knightley, tweed-wearing, fiercely logical thirteen-year-old investigator of the weird, was just getting used to having his private-eye dad back in his life. Then Alan Knightley went walkies, leaving Darkus with the family mutt—a traumatised ex-police dog—as his only partner in crime-solving.

Now a mysterious canine conspiracy is howling for the attention of Knightley & Son . . . Shadowy trained hounds are attacking policemen during the full moon. Family pets are being mauled by a beast at a top London beauty spot. And two curiously alert canines seem to be watching Darkus’s house. No one is using the word “werewolf”—yet—but it doesn’t take Sherlock Holmes to work out that someone or something sinister is messing with the minds of London’s dog population. Will our intrepid father-son duo make it to the next full moon?

The training was great preparation for my first school visits, which took place across the U.S.