I received a copy of this audiobook from NetGalley. I liked the cover and I like serial killers. I got more than I bargained for. I had never read anything by Erin Young. I didn't realize this was book 2 of a series, and other than not knowing details of Riley's background, which there were enough of here to get the gist of it, this book was fine as a standalone. It is a good FBI procedural with a complicated plot, and a realistic portrait of America post-pandemic. There were a lot of characters that I frequently got confused when listening to in small snatches. Once I listened for a long period this resolved. Narrator Kate Handford did an excellent job bringing Riley to life and was easy to listen to. Riley is a smart feisty heroine. Having been a police sergeant she left the force and joined the FBI. Assigned to a position with an unfriendly partner she's not sure she can trust and a boss that doesn't like her, she wades right into two cases she believes are connected- a threat against the Iowa's governor and her family and the case of a serial killer named the Sin Eater. It involves violent homegrown terrorists, religious fanatics, con men, and women haters, the things we are reading about in the news daily. It demonstrates how easily some people can fall under the influence of these people. I think it will haunt me for awhile.