I was already super interested in this book when I saw the cover. It just really stands out with the black and the red. I have always been a fan of true crime novels or just mysteries books. What really intrigues me about this book was how it was real because it was a true crime and it actually happened which is just quite unbelievable, to be honest. "A passion for poison" was an absolutely brilliant read that I thoroughly enjoyed. I found it quite unbelievable what people would do and how they can start from such a young age that most people wouldn't even believe that they did. I have not heard of any serial killers who used poisoning to kill their victims so this was quite new but I really enjoyed reading it. I would highly recommend this to anyone who is a fan of true crime like me and I hope you enjoyed reading this as much as I have. I would give it 5 stars!