Brat Farrar by Josephine Tey (author)

A stranger enters the inner sanctum of the Ashby family posing as Patrick Ashby, heir to the family’s sizeable fortune. The stranger, Brat Farrar, has been carefully coached on Patrick’s mannerisms, appearance and every significant detail of Patrick’s early life, up to his thirteenth year when he disappeared and was thought to have drowned himself. It seems that Brat is all set to pull off this most incredible deception. But then old secrets emerge, threatening to jeopardise the imposter’s plan, and his very life…