Idk how each book keeps getting better but it does. The cult in this book was so well imagined that it was believable and terrifying in how true something like this could be and has been in the past. Absolutely terrifying. The entire section of Robin undercover was just incredibly nerve wracking! The endings of these are always well tied up and well explained, and there’s always the little hook of the relationship progressing to keep you going waiting for the next. Absolutely love this series!