http://q3o3hdoxloqjhel5plgp4zxclyuiirbgu2cm5wu5bsoe3yuju6jtc5yd.onion/guides/the-drug-users-bible
From Amazon: “Over a 12 year period the author of this book self-administered over 180 psychoactive substances; both chemicals and plants. For each he recorded the life-sensitive safety data, including the anticipated onset times, the common threshold doses, the routes of administration, and the expected duration of the experience.