Ancient Indian Yogis compiled a series of techniques for achieving enlightenment. The text, written in the 8th Century, is known as Vijnana Bhairava. The book has been previously translated into English; however, the techniques are described in an esoteric manner which is hard to interpret. Swami Radhikananda  Sarawati and Milind Dhond have described the techniques in an easy-to-follow format which allows the reader to experience states of spiritual awareness without any prior knowledge or experience with meditation.