This book gives a very comprehensive knowledge about the rare and uncommon diseases.This book is very informative mainly for the cure of diseases and for the prevention of diseases.It was a great experience to read this book.This book has many things about which I was unaware before. I just hope to read more books like this.While reading this book I thought there is much more things which I must have to know which isn't normally available. But this book is best for those who want to explore things from depth.