Advanced Course in Yoga Philosophy and Oriental Occultism by Yogi Ramacharaka was first published in English in 1904 by the Yogi Publication Society Chicago, Illinois. It deals with the inner yoga as a spiritual path more than the physical exercises. Please keep in mind that this book might be fake since there is no other record of a Yogi Ramachara. This has led to speculations that William Walker Atkinson might be the author. This, however, does not mean that the content is not relevant, William Walker Atkinson was known for writing literature and essays on eastern spirituality under other names.
Language title : Advanced Course in Yoga Philosophy