Yoga:
The Alpha and the Omega
Vol. 4
talks on Patanjali's Yoga Sutras
(this volume re-published as The Alchemy of Yoga)

by Osho   

talks given live    Apr. 1975
Pune, India
book
see these links to other sites for availability.
           oshobob  The Living Workshop                                
                                                       Osho Books
Yoga master Osho talks about in this book:

Patanjali