This is the best book to read on LSD. Only a little bit though otherwise your pupils will dilate too much to read. Obviously.
I first discovered him through reading this https://www.vice.com/en_us/article/the-ketamine-secrets-of-s... and then went on to read every one of his books except for his last, which I want to save for the right time. This guy has had a profound effect on my life and I cant recommend his work highly enough.