Yakusan:
Straight to the Point of Enlightenment
talks on Zen

by Osho

talks given live   Jan. 1989
Pune, India
book, eBook, mp3 audio, video.
see these links to other sites for availability.
Zen masters Osho talks about in this book:

name in book            Chinese pinyin

Koke..........................Xinghua
Tanku........................Tankong
Rinzai.........................Linji
Yakusan.....................Yaoshan
Riko............................Li Ao
Dogo...........................Daowu
Ungan.........................Yunyan
           oshobob  The Living Workshop                                
                                                      Osho Books