Adventures of Master G and his faithful disciples Morose and Bitumen in the Nigredo Valley, or Modern Alchemy. Phantasmagoria: Appendix to the Trilogy

After passing through the 'alchemical fire' Kasyan and Gouri receive their first alchemical initiation from Admiral, one of Master G's oldest disciples. This initiation opens the mysteries of the alchemical stage of Nigredo for them. The description of the astralized space of this stage is the very subject of the present book.
In order to follow the alchemical Path of Master G further, the light Path of ascension, they have to undergo the next alchemical stage, which is the stage of purification called Albedo. This stage and its various techniques for the purification of the soul and the sublimation of perception are described in the books of the series called 'Alchemical Teachings', 'Inner Light' and 'Inner Christianity'.