One of the Family by Mark Edwards

Lucy Foley meets Succession in the gripping new thriller from the 5 million copy bestselling author of The Wasp Trap

Patrick couldn’t believe his luck when Holly fell for him. She’s wickedly funny, beautiful, and with an intimidatingly successful father, Charles.
So when she invites him to Charles’ mansion for a New Year’s break in Scotland, all he’s hoping is that they’ll accept him as one of the family.
But everything feels a little off. Whispers in hallways. Rumours of a body that got found nearby the previous year. And something very strange about Charles’ new girlfriend.
Every family has secrets, and Patrick tells himself all he needs to do is survive the next few days.
But then the first body is found, and Patrick realises that all he needs to do is survive the next few days…