As nowadays we are benefiting from the the many outcomes of high-throughput molecular biology, the articulate hypothesis-driven research is often being neglected. This book provides some interesting glimpse into those historical discoveries regarding the RNA world from an era which was poor in prior knowledge and had to heavily rely on hypothesis-driven research. If you are a student and you look for "fundamentals of the RNA world" of today- you may want to look for other books. Teachers and senior researches will find this book extremely interesting, if they have the time for it.