So I knew that this would be good as this is from the duo behind The Wife Between Us. And of course, it was excellent. Jess is a broke makeup artist who agrees to be a test subject in a professor’s psychological study about ethics and morality. It starts with innocent questions and seems like a great way to earn extra money. With time, things get more and more out of hand and she finds herself being manipulated. The book is fast paced and written in a similar way to The Wife Between Us, meaning that it keeps you on your toes the entire time. It’s packed with twists and turns. A few, I guessed… a few had me blindsided. I really loved this book and read it in just a couple days. It’s dark, twisty, and fun!