A while back there was a publishing company called Loompanics. They carried all kinds of crazy books, it was very interesting to look through their catalog. Paladin Press bought their book list eventually, but Paladin Press also went out of business. Here's some background info.

https://en.wikipedia.org/wiki/Loompanics https://en.wikipedia.org/wiki/Paladin_Press

So, you think to yourself - there's no way I can get my hands on a copy of these books. But never fear! If you search on the publishing company name, you can find many (most?) of them on https://annas-archive.org/.