Federal Bureau of Investigation 
The FBI File on Bhagwan Shree Rajneesh (Osho) [PDF ebook] 

Bhagwan Shree Rajneesh, later known as Osho, was an Indian guru and leader of the Rajneesh movement. He and his followers created Rajneeshpuram, an intentional community in Oregon. He spent much of his life in the United States, where he was subject to investigations by the Federal Bureau of Investigation (FBI).
This ebook is the FBI file on Osho, as legally released by the FBI with censorship. It reveals that Osho and his team were under significant surveillance for years.
This file of 591 pages is invaluable for anyone with serious interest in Rajneesh and his operations.
Although believed to be a cult leader, his teachings are still cherished by millions of people worldwide.