After the loss of her husband, Freya Miller needs a new start for her and her daughter. While browsing ads for apartments in a coffee shop, Freya meets Dr. Marsden who offers her an opportunity that is too good to be true. An apartment called Added House in a fashionable neighborhood in London. Freya can't believe her luck especially because Dr. Marsden is asking for way below what the apartment is worth, but after her and Skye move in, strange things start happening. Freya thinks maybe she's going crazy especially when furniture starts moving and she starts hearing weird noises and seeing strange things. Is it all in her head due to the stress of starting over or is there more to what goes on behind closed doors at Adder House?

I really enjoyed this book. It moved at a quick pace and held my interest the entire way through. One thing I find with a lot of mysteries is that I can figure them out early on, but I could not figure out what was going on at all in this book. The whole cast of characters was mysterious and I couldn't tell who was behind the strange things happening in Freya's apartment. I liked Freya as the protagonist because she had her issues, but cared very much for her daughter and wanted to give her a better life. Although there were times she made me want to scream, I just wanted her and Skye to be okay.

There were some chapters of this book which flashback to a psychologist doing experiments on a young child. Throughout the book I could not figure out what they had to do with Freya and Skye. It does come together at the end, but in my opinion they made the book feel a little disjointed. Also, the ending of the book moved very quickly so make sure you pay extra careful attention or you could get confused. I wish the Epilogue had been longer, but overall I would recommend this book to mystery readers.

Thank you NetGalley and Amazon Publishing UK for an advanced copy in exchange for my honest review.