I liked the previous book by Greer Hendricks & Sarah Pekkanen — The Wife Between Us (2018) — and looked forward to their 2019 novel.

It’s even better.

Jessica, a Manhattan makeup artist, signs up for a research study into morality and ethics. She needs the money. It pays $500.

But what does Dr. Shields’ actually want of her?

A TV series based on the book is planned.

Amazon.