This book is a marvel. The illustrations are very abundant and very clear. It's almost a comic! But a good scientific level. It is a university-level book, but as it is very didactic, it is in my opinion available to anyone tank level (scientific if possible). Each chapter is preceded by a short paragraph explaining briefly the purpose of the chapter and the new concepts. End of the chapter there is a summary of key concepts and a list of questions. It may also supplement the information by going to the website dedicated to this book. This is an excellent support for students, but this book is so nice we read simply for pleasure and fun. This is my case. Note also that it is a translation, and the translators did a great job. Everything is translated even illustrations and figures. In short this book is well worth the price, but I advise those who can afford to buy the hardcover version, given that this book is big and heavy ... and exciting.