Herring calls this book a process book rather than a craft book. I haven't read many craft books until recently -- have read 3 within the last 2 months -- and this is by far the best. Encompassing ideas of yoga, Herring offers writing exercises that allow the writer to explore her inner life as well as her writing, both the overall process and the specifics, such as plot, character development, etc. This book helps me feel that my writing is important, even if it never sees the pages of a magazine or a publisher. The focus on process and understanding oneself is refreshing and helpful.
The one part I disliked is the section where Herring suggests creating a relationship with your writing, as in making it a character in your life. I thought this a bit extreme for me; I prefer Jeff Davis' idea of meeting one's muse and creating a relationship with them.
Overall, though, this book has been a huge help for me in my writing journey.