

I searched to check…
Paperbacks average 10-20, hardbacks 40-60.
But obviously that’s not every book. The more it’s read and the thicker it is the faster the spine falls apart. Obviously a hardback threaded together with heavy paper is better than pulp and cheap glue. But there’s a lot in between the extremes.
I could buy a cheap paperback, throw it on a shelf, and it will look perfect.
That doesn’t mean the glue didn’t magically degrade and it will hold together thru a normal reading tho
Very Aladeen…