Wow! I have been putting off this book for months, having it sitting on my TBR (despite recommendations from friends) and I cannot believe I didn't pick this up sooner! I was hooked from the first chapter. I would definitely read another story by Lisa Jewell. 
With multiple POV unreliable narrators, and a graphic writing style, I loved the structure of this book. My brain was constantly activated from horror/disgust or desperately trying to work out the next plot twist, making this a fast-paced and exciting mystery. Despite not typically being a thriller fan, the unsolved mystery, horrific plot, and investigative journalism maintained my interest.