Leads on the Persian religion question.

[kassia]

I'm trying to learn more about religious practice in Persia between 600 and 1200.
Some of the following books are more popular than scholarly, but I'm hoping they'll at least give me a list of terms to look up and maybe even the head of a reference trail. If you have any guidance toward or away from any of these, please let me know.

Religion in Iran: From Zoroaster to Baha'ullah
By Alessandro Bausani
http://books.google.com/books?id=fVMAAgAACAAJ

Our Own Religion in Ancient Persia: Being Lectures Delivered in Oxford Presenting the Zend Avesta as Collated with the Pre-Christian Exilic Pharisaism, Advancing the Persian Question to the Foremost Position in Our Biblical Research
By Lawrence Heyworth Mills
http://books.google.com/books?id=KbFZAAAAMAAJ
(maybe too early, but possibly helpful background)

No God But God
By Reza Aslan
http://books.google.com/books?id=FEfdoRL1rrgC

Theodore Abu Qurrah
Translated by John C. Lamoreaux
http://books.google.com/books?id=XO5IHgAACAAJ

Spirituality in the Land of the Noble: How Iran Shaped the World's Religions
By Richard C. Foltz
http://books.google.com/books?id=h5zvAAAACAAJ

Babai
http://www.peeters-leuven.be/boekoverz.asp?nr=743