I enjoyed reading this book. Sometimes it can be easy to forget just how fascinating our sun really is. This book helps in this regard. It describes the theories of what the sun was like 5 billion years ago, compared with what it is like today. It discusses the visible part of the sun, as well as the interior of the sun. It also discusses the process of what makes the sun shine, as well as affects on earth, as well as space weather. All is very fascinating, though very complex. At times it is difficult to follow, and at times it gets slightly off the topic. Nevertheless, I would recommend this book to anyone interested in learning more about our sun.