This book is very thorough. This is the first source I see which reviews the many western scientific studies which have verified the health claims of this ancient drink. This is also the only place where I have found a quantified indicator (Ph) of the state of readyness of the drink, and a recommended dosage. Other good sections include how to prepare the drink, a troubleshooting guide, health problems which can be treated with kombucha and what other treatment may be helpful, and recipes using kombucha. This book packs a lot of information and is definitely worth keeping as a reference.