Cosmic Trigger: Die letzten Geheimnisse der Illuminaten oder An den Grenzen des erweiterten Bewusstseins

"Cosmic Trigger" deals with a process of deliberately induced brain change... This is called "initiation" or "vision quest" in many traditional societies and ... a dangerous variety of self-psychotherapy in modern terminology. I do not recommend it for everybody... the main thing I learned is that "reality is always plural and mutable."
— From the Preface