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Don’t close your eyes. Don’t fall asleep. Don’t let them in.

Thea is an insomniac; she hasn’t slept more than three hours a night for years.

So when an ad for a sleep trial that promises to change her life pops up on her phone, Thea knows this is her last chance at finding any kind of normal life.

Soon Thea’s sleeping for longer than she has in a decade, and awakes feeling transformed. So much so that at first she’s willing to overlook the oddities of the trial – the lack of any phone signal; the way she can’t leave her bedroom without permission; the fact that all her personal possessions are locked away, even her shoes.

But it soon becomes clear that the trial doesn’t just want to help Thea sleep. It wants to control her sleep…


I really enjoyed this book! It is fast paced, action packed and isn't your typical psychological thriller. As someone who is a very light sleeper and can struggle to get a good night's rest, I found the story connected with me instantly and I was hooked from the beginning!

Mumford jumps straight in with this story and we are aboard a thrill ride of twist and turns very quickly into the book. I love how she has the reader connect with Thea, and her mum Vivian, very early on in the book. You are rooting for them from day one and you want Thea to find the help that she so desperately craves. Due to her insomnia, she always feels like a shell of a person and wants nothing more than to actually live, rather than just get through each day in whatever way she can. There are so many people out there who go through this and when you get so bogged down and surrender to the darkness, it can be extremely difficult to fight through it and come out into the light.

I found the chapters on the island so atmospheric. You could so clearly picture the sleep centre, the surroundings and landscapes and the characters introduced to us there are great. I really loved Rosie and Rory and thought they smoothed out Thea's rough edges nicely. The idyllic setting of the island brings the reader into this sense of comfort and straps you in for what quickly becomes a fast paced, tense and thrilling ride.

I won't say much more, you can probably tell that I really enjoyed the book. The only reason I didn't give a full 5 stars was because I found the ending a little abrupt. I would have liked it to continue a bit more.

Big thanks you to HQ, Harper Collins and Net Galley for allowing me to read this pre publication!


Fast paced



FAVOURITE QUOTE: 'That was the thing about the dark. All you had to do was strike a match, or flick a switch, and the shapes you'd thought were monsters turned out to be just boxes and bags and old junk piled high. It was time to strike a match.'


Vivian, she seemed like such a doting mother but also such a strong woman. I'd love to have known her in real life.




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