One of the Family by Mark Edwards 

Mark Edwards is one of my favourite authors in this genre, and I’ve read every one of his books. One of the Family is right up there with the best of them — exciting, sharply written, full of well‑drawn characters, and packed with the kind of twisty, ever‑present mystery he does so well.

Patrick, a driver and aspiring filmmaker, meets Holly — an uptown girl from an extraordinarily wealthy family — and soon finds himself invited to their remote Scottish mansion. There he meets her father Charles and his unnervingly youthful new girlfriend, her brother Lewis, her sister Miranda and Miranda’s husband Zach. When Charles’ girlfriend turns out to be a striking doppelganger of his late wife, things take a decidedly dark turn. Add in a couple of unsolved deaths that naturally pique Patrick’s curiosity, and you have a novel that’s impossible to put down, the kind that keeps you reading well into the night. Mark Edwards is the master of the psychological thriller, and this one is fantastic.

What makes the novel so irresistible is the way Edwards layers unease into every interaction, every room of that Scottish mansion, every secret the family would rather keep buried. The characters are sharply drawn, the pacing tight, and the twists land with that satisfying jolt he’s so good at. It’s a dark, addictive psychological thriller — clever, unsettling and absolutely gripping from start to finish.

https://www.goodreads.com/review/show/8744939512