The only problem with this book is that it lacks colour photos that would enhance the reading of this book. However, this book is full of information on how to dye wool and other fibers from plants and lichens. The book goes over all the techniques of dying different fibers. It also has a huge section on different plants and what colours you would expect to get when combined with a moderant. The book also contains a section on where to get and how to identify plants and moderants as well as other books that are useful. There are many helpful tables on dyebaths, measurements for moderants and the effects of weak, medium and strong dyebaths. This is a wonderful book for the beginning dyer and an excellent resource, it is easy to read and understand eventhough I think it could have more pictures of the plants, moderants and different colours you may get.