I have been a student of Yang style Taijiquan for nearly 20 years and, since 1994, have been offering guidance to others who are interested in Taijiquan. Yang, Zhen-Duo, the author, is Yang, Cheng-Fu's son and of course the highest current source of knowledge of his family's style of Taijiquan. I've used this book as a textbook for my classes from the start and will continue to do so as long as it's available. The pictures and text are very specific to the Traditional Yang family Taijiquan long form of 103 movements and the book also includes application ideas for many of the postures. This is the first book I recommend to begin your Taijiquan library.