This was fine. A revenge thriller about coersive control which was an extended metaphor for the power and danger of extreme fitness trends. I found it pretty far-fetched though and it wasn't pacey enough for a thriller for me. To be honest from the author of Elizabeth is Missing I was kind of hoping for more. But there are interesting discussions in this novel all the same. Lots of trigger warnings though not only surrounding domestic abuse, but also dieting and exercise addiction.
This honest review is given with thanks to NetGalley and the publisher for this book.