This story is an account of Wilson's lifetime apprenticeship under the master shamanic practitioner, Brion Gysin, the hidden master of the avant-garde, of whom William Burroughs said, "He is the only man I respect." The book focuses on events as they developed just prior to and after Gysin's death in 1986. This book details the extreme psychic "Third Mind" effects known as The Process and includes transcribed audio hallucinations, notes, cut-ups, the interview format and collaged material.

PERILOUS PASSAGE is a cautionary tale about the uses and abuses of power, a paranoid espionage thriller. Like Gysin and Burroughs, Wilson treats language itself as a parasitic invader which must be resisted, broken up and reassembled. This book is about how the magic was passed on and carried into the future.

PERILOUS PASSAGE finalises Wilson's Green Base Trilogy which commenced with Dreams of a Green Base and "D" Train.