There are a few places where the Dewey Decimal System betrays its Victorian origins. The 200s are one of these. 220–289 are dedicated to Christianity and the Bible. All other religions are given 290–299. So faced with the full panoply of world religions outside of Christianity, I ended up choosing this slender book on cults aimed at teenagers with short attention spans.
The treatment is a bit cursory and it’s been a while since I read it so I don’t remember the details very well, but I think that the book failed to really define quite what a cult was and included in its ranks of cults some groups that are arguably not cults at all.