This is by far the best book that I have read on any life transforming physical exercise including other books on this subject, as well as books on yoga and tai chi. The author writes simply and masterfully. He promises an easy to learn, easy to do "exercise", and delivers. This book has none of the New Age psycho-babble that mucks up so many other books on the subject.

The author has written a clear & practical book, with compact and understandable information about Qi Gong in general plus some nice information about what it has done for him personally.
It has good instructions and a lot of black and white photos which are easy to follow.
I found the excercise sequence very simple to do. It is relaxing and indeed takes less then 10 minutes to perform.
I think this book is a great start for beginners. Anyone can do these excercises.
If you're interested in other, longer and more intensive Qi Gong forms, I'd like to recommend the book 'The Swimming Dragon: A Chinese Way to Fitness, Beautiful Skin, Weightloss and High Energy' by T.K. Shih.