This book is a good 'idea' book for yoga instructors. Putting together a yoga class requires a lot of work and some creativity. It is challenging to come up with themes. Many times, it is easy to rely on our comfort zones when teaching. Nancy Gerstein's "Guiding Yogas Light" has some good, basic lesson plans that can inspire an instructor.
The format of the book is nicely laid out. Gerstein's writing is poetic and clear. I have been able to use some of these ideas very easily in my classes. The only complaint I would have with this book is that I wish there were some longer practices. Many of the scripts here are for 5 minutes or less. This is a good place to reference from, but a little more would be nice.
Very well thought out and nicely put together. It is soulful and wise approach to yoga. I love it.