I´ve been into true crime since I was 10 and started watching Unsolved mysteries on tv, and after 3 decades my tolerance for sad and awful stuff is abnormally high, so if you read on and think I must be a nut for liking this book so much, I feel like I need to explain myself a bit and my interest in this kind of material. I rarely find a book or a show that introduces me to lots of new cases, especially if we´re talking about crimes that happened before or around the time I was born. But this book succeeded in doing that. A lot of the murders are not well known, they were committed in the USA and mostly in or "around" Chicago and Wisconsin. Many of the cases were extremely scary, odd and frankly horriffic. I kept thinking that it couldn´t get any weirder or worse, but it did, oh yes, it always did. I googled a few of them and most remained unsolved but some had resolutions, even the one that I thought least likely to be solved because it was so motiveless and happened so long ago. I definitely don´t recommend this book for those who can´t take reading about child murders. It has some of the worst cases you could imagine (although the chapters are all short so there´s no dwelling on horrible details). It´s well written, accurate and gives you insight from those who worked the cases, and I noticed a lot of details that are covered in the book are absent from news articles and reddit threads.