There is also "Reconciling yogas: Haribhadra's collection of views on yoga"http://books.google.com/books?id=fZ6qQM ... &q&f=false
I have only read the first 2 chapters, so am unable to discuss it in any depth. Haribhadra is a Jain, and he structured his work in line with the structure in Patanjali's Yogasutra. He seems to be especially antagonistic with the emerging Tantric shools. He also advanced arguments again Vedantin and Buddhist yoga. The Buddhist work he used was a text by an individual named Bhadanta Bhaskara, and apparently there are no other record elsewhere in the Buddhist world for this person or his system of Buddhist yoga. Curious indeed.
When I set out to lead humanity along my Golden Path I promised a lesson their bones would remember. I know a profound pattern humans deny with words even while their actions affirm it. They say they seek security and quiet, conditions they call peace. Even as they speak, they create seeds of turmoil and violence.
- Leto II, the God Emperor