Original ad here.
Gather around, children, and you shall learn of an ancient time, before the internet. A day of paper fanzines and weird information obtained only via books delivered by snailmail.
The main purveyor of such good stuff was the Loompanics catalog. Alas, they were driven out of business
in 2006. The current website
using their domain name is a shell and a scam by cybersquatters.
Over one hundred Loompanics books have been tagged as a Goodreads collection.
You can get a small sense of what they were all about there.