Good Times: Bad Trips, Cliff Hengst and Scott Hewicker, 2007. Lit and art world luminaries describe their experiences, with illustrations.
5. A Voice Through a Cloud, Denton Welch, 1950. Excruciating pain is hallucinatory, and painkillers, too. "I was exquisitely conscious of the texture of things. There was torture in the smooth sheets, in the hair of the mattress and the weight of the blankets ..."
6. Valencia, Michelle Tea, 2000. You can call it fiction, but I've been involved in illicit transactions with one of the characters.
7. The Peyote Dance, Antonin Artaud, 1976. A French Nobel Prize winner thinks Artaud didn't even take that trip in the 1930s. Maybe not, but this book still gives me mescaline flashbacks like the peyote trip in Beavis and Butt-Head Do America (1996).
8. Go Ask Alice, Anonymous, 1971. I haven't read it, but my partner Jonathan says our teen heroine's (to quote the cover text) "harrowing descent into the nightmarish world of drugs" acid trips and gay sex convinced him to follow her path.