This author did his research – BEFORE he became clean. I can’t even guarantee he is clean now, only that he has researched the harms and benefits of his abuse to the nth degree. It doesn’t seem to be progressing him anywhere, but it’s so interesting reading about the research going into addiction studies, etc. For example, naloxone.
This author is well-written, highly detailed, and very attention-grabbing. He details stories with other addicts, not just his own. It’s really interesting. Give it a read!