You can buy it at some gun shows and other "survival related" events.
It is a cartoon-quality "how to" book that would, as Coloradan pointed out, likely get you killed as it would produce a close facsimile to a functional destructive/defensive device. It's been a long time since I looked at a copy, I don't recall seeing anything about Ricin in it. If so, instructions probaly involved stick-figures and a 1,2,3 explanation chart, leaving off the part where you drop dead from exposure.
: )
Exactly, Paladin Press was big at gun shows and the like back in the day. I'm not certain at all if they are still in business, as they were involved in a murder trial here in MD about 13-14 years ago, when some doofus hired some other doofus who had a copy of Paladin Press' "Diary of a Hitman" or some such drivel. They pretty much dropped off the radar screen, as far as I know, after that.
Like I said, and you reiterated, the quality of the "reading material" proffered was dubious at best, and downright dangerous to the user at the worst. I still have some of the junk I ordered from them mail order hanging around (as I recall I got the catalogue *at* a gun show I attended). The only book remotely worth anything in the end was Claire Wolfe's "101 Things To Do Until The Revolution". The rest was pure dreck...
the infowarrior