Complex sentence: Over four years, Fortune also published a number of articles discussing the Hermetic Qabalah in "Inner Light" magazine, before assembling these for publication as the book "The Mystical Qabalah", which is widely perceived as a milestone in her esoteric career.
Split into simpler sentences: Over four years, Fortune also published a number of articles in "Inner Light" that discussed the Hermetic Qabalah. These articles were then assembled as the book "The Mystcal Qabalah", which is widely perceived as a milestone in her esoteric career.