For some books, a PDF is sufficient. For Liber Khthonia , the physical object—with its silver stamping, its gilded edges, its 344 pages of direct, unadorned instruction—is part of the point. And for those willing to invest in the physical copy, the consensus is that the return on that investment is substantial.
Cullen outlines the geography of the spiritual underworld, mapping out the rivers of Hades, the fields of Asphodel, and the depths of Tartarus as functional psychological and spiritual spaces.