I highly recommend, Darker Teachings Of The Immortals -- DTOTI. This book saved me when I had all but given up -- having lost my way and will. It made it all start to make sense again. "Love is the reason." Nyght's take on the way to achieve immortality is nothing like anything else I've ever read.
For me, it explained the true meaning of "a path with heart". The book gave me what I had been seeking all my life.