For decades, can one consume consciousness-expanding substances and still be integrated into society? Former journalist and adult educator Claude Weill believes so. He spoke with nine individuals who regularly journey through mental realms that would remain closed to them without these substances. In the book, they candidly share their experiences with psychedelics and empathogens. From these personal testimonies emerges a picture of a mature, responsible approach to psilocybin, LSD, ayahuasca, MDMA, and more. Beyond romanticization or addiction, LSD veterans live with the certainty that the doors of perception can be opened much wider than we think. Interviews with three distinguished experts in psychonautics complement the travelers' statements.