Welcome to the Open Hyperspace Traveler Course. If you are reading this, you presumably have an interest in entheogenic drugs - psychoactive compounds found in plants and fungi - often referred to as psychedelics or simply entheogens. In this manual we have tried to collect and provide unbiased information backed by both experience and science on the various entheogens out there, on how they can be used safely, responsibly and bene cially, what risks they present and how to possibly handle any problems that may surface when using them.