I'm looking for sources on the history of Vajrayana, including its origins and development in India and Tibet. I'm not familiar with the area, so anything may come. I already know of Sam van Schaik's EarlyTibet blog and I have Ronald M. Davidson's book "Indian Esoteric Buddhism: A Social History of the Tantric Movement", but basically that's all. I'd especially appreciate good summaries and enlightening essays, but as I've said, any good text is OK.
Note: it is not the religious history I'm interested in but the latest academic research.
"To know by thinking falls into the secondary. To know without thinking falls into the tertiary."(Yangshan Huiji, X1405p58b18-19; tr. JC Cleary: A Tune Beyond the Clouds, p 43)"While teachers of the middle way, mind only, transcendent wisdom, mantra, and other schools may have their own assertions, the fulfillment of those intentions is the same. There is not a single thing that is not contained within mind."(Gampopa to Düsum Khyenpa, in "The First Karmapa", KTD Pub, p 254)Mahayana LinksThe European Buddhist Blog