Upper bookshelves
You1 sometimes need something a trifle less mainstream to read.
But you don't necessarily wish (or feel any need) to share this with the webbed world, so you do what you can to make casual access slightly harder than usual. (aka "Stealth by Obscurity"!)
"De gustibus non est disputandum"
as my scarily effective Latin master Mr. Greenhalgh probably would have said.