"In middle age, Ehrenreich came across the journal she had kept during her tumultuous adolescence and set out to reconstruct that quest, which had taken her to the study of science and through a cataclysmic series of uncanny-or as she later learned to call them, "mystical"-experiences. A staunch atheist and rationalist, she is profoundly shaken by the implications of her life-long search. Part memoir, part philosophical and spiritual inquiry, LIVING...