This book is about Kimberly Clark Saenz, a nurse at a dialysis clinic, who injected bleach into patients. One always thinks that the people who are in the healthcare field are in it because they love the work, the patients, and helping people. Kimberly here was clearly not one of those types. I thought the author did a good job of presenting the case and keeping it entertaining. I ordered a couple of books of this nature after watching a show about nurses who kill, and Kimberly was featured on the show. I do not understand how she could do these things to people who are already sick in some form. It's cruel and unnecessary. I highly recommend this book, but maybe not if you are a dialysis patient.