The osho meditations are not an ancient practice. They are, in fact, a type of meditation developed within the last 50 fifty years. The man responsible for this is Bhagwan Shree Rajneesh or Osho as he was known in later life.
Born in 1931, Rajneesh was not someone who sprung to fame in some tumultuous event. Instead, it was his knowledge that made him shine. His thirst for knowledge was unquenchable and from a very early age onwards, Rajneesh craved learning. By the time the Sixties drew near, Rajneesh had spent a lot of time dissecting religions and distilling the knowledge he gained. From this knowledge, he developed his own dynamic style of meditation which later became known as Osho meditation.
When he reached enlightenment he was named Bhagwan Shree Rajneesh. Bhagwan Rajneesh spent the rest of his life passing on the knowledge he had gained to his disciples. The daily discourses that he had every morning with his disciples are now published as osho discourses. The discourses and tantra books are all available online, if you desire to purchase them.
After spending several years travelling the world and spreading his teachings, Bhagwan Shree Rajneesh returned home to India in 1986. He spent the rest of his life in his home country and it was during this period that he changed his name to Osho. Plagued by illness, Osho finally succumbed and passed away in 1990. His teachings still live on in the print form and audio visual forms as well as through his disciples.