Y.Wu is a co-author of Complete Wing Chun : The Definitive Guide to Wing Chun's History and Traditions, published in 1998.
Currently he is a trainer for Taijiquan and a part time writer of martial arts ebooks.
Wu's sophomore eBook The Ip Man Question - Kicks, power & strategies in the martial art of Wing Chun was published on 9 Aug 2011.
On 9 Aug 2012 Wu published the first of his TaijiKinesis eBook trilogy entitled TaijiKinesis Vol 1 : Navigating the Taijiquan Maze. The second follow up TaijiKinesis Vol 2 : Learning the Taijiquan Form will be released in Dec 2012.
Wu's eBooks are available from http://zenmindsword.wix.com/taijikinesis