We will never know for sure.
I have just been trying to think of the most useless book I can imagine and the nearest I can get to complete uselessness is a 1960s road atlas
I am having a turf out at home here and have a load of books I am giving away or taking to a charity shop.
If my posting ends here peoples imaginations will start running wild.
Well no. I have a lovely AA hard cover 1996 road atlas on my lap I am unsure about. An "X Files Companion", don't laugh out loud, a book on self defense, romance novels of late wife's, you get the drift.
People aren't daft these days and everyone knows about eBay.
My avatar is a poor likeness.