I think you drastically overestimate the quality of the books this article talks about. These publishers will publish any rubbish you give them just to profit from selling to librarians who do not understand enough of the subject matter to know they are being scammed.<p>I&#x27;ve been contacted on Facebook by these scam publishers, inquiring if I&#x27;d like to publish some of my university essays.<p>There are plenty of alternatives. Most of the niche knowledge is distributed via scientific journals and conference proceedings. And many scientific publishers will happily publish books on any obscure topic, if you pay for printing.<p>Scientific publishing has plenty of problems, but these kinds of &quot;publishers&quot; are the worst; they leech off already stretched library budgets for short term profits without providing any value to society at all.