I currently have a 1979 version of this book; however, it is published by the International Headquarters Sufi Movement, Geneva, and not by the Shambhala. I must say that I am a little shocked that the current version being offered to the public does not have the same content (as described by the table of contents) as the 1979 version. My version has "The way of illumination", "The Inner life", "The Soul, Whence and Whither", and "The Purpose of Life". Now, the publishers at/of Shambhala, for whatever reason, thought that they were justified to change things up a bit or a lot by changing the titles of the contents(I can not even imagine why it would be necessary), rearranging the contents, and even omitting content in it's original version. In any event, I find this terribly unsettling. At any rate, if it is possible to get an older version, then do so. Anything written by Hazrat Inayat Khan is for anyone coming from whatever religious background who maybe seeking more, as he respects and cherishes, whole heartedly, the Vedanta, Zend-Avesta, Kabala, Bible, Qur'an, and others. I think that this is what makes him and his work so unique; that he is so unrelentingly loving and understanding of mankind. "The Inner Life" deals with topics such as: original spiritual qualities of man, man's union with God, defining genuine happiness. The best thing about Hazrat Khan is that you do not have to be a proclaimed Sufi to benefit from his work. His work was written for everyone.