Singer follows two very different women as they learn to recognize clues by which the invisible world reveals itself to human understanding: dreams and fantasies, visionary experiences, human interactions, and through the depths of solitude. She reveals how the invisible world is viewed objectively by the physical and biological sciences, traditional and gnostic spiritual disciplines, and the psychology of the unconscious. She then suggests how to integrate the visible and invisible in our lives.

(From Goodreads)