Book excerpt: Until now, the single most important unpublished work by C.G. Jung—The Black Books. In 1913, C.G. Jung started a unique self- experiment that he called his “confrontation with the unconscious”: an engagement with his fantasies in a waking state, which he charted in a series of notebooks referred to as The Black Books. These intimate writings shed light on the further elaboration of Jung’s personal cosmology and his attempts to embody insights from his self- investigation into his life and personal relationships. The Red Book drew on material recorded from 1913 to 1916, but Jung actively kept the notebooks for many more decades. Presented in a magnificent, seven-volume boxed collection featuring a revelatory essay by noted Jung scholar Sonu Shamdasani—illuminated by a selection of Jung’s vibrant visual works—and both translated and facsimile versions of each notebook, The Black Books offer a unique portal into Jung’s mind and the origins of analytical psychology.