I own that book. It's full of lots of information, but a little boring to read. I read that whole book and it only has a few sentences that actually describe what the experience is like.

I expected more. I expected detailed trip reports, detailed dosage information, and detailed yopo preparations, but it’s not to be found anywhere in that book. Very disappointing in that respect, but otherwise a very good book to have. There’s lots of historical information, information about active alkaloids found in the seeds, lots of information on bufotenine tests, etc. It’s a must have book, but it lacks practical information like proper yopo snuff dosage, oral dosage, proper ingredient ratios for making snuff, trip reports, etc.