These very damaged paperbacks came to be repaired and rebound into hard covers. Evidently the text is no longer available and is important to the owner.
As a hand bookbinder who enjoys to do special, individual bookbinding projects, I have rescued lots of paperbacks and enjoy to see them secure into hard covers and ready for reading.
It seems an expensive exercise when perhaps a new copy can be purchased but often they are out of print. One client told me, “this book changed my life when I was 18″ and he was a very mature gentleman, so the idea of purchasing a new copy was out of the question. Books do retain memory to many of us.
Hope you enjoy the resurrection of these books. Dare I say that a lot of the pages were needing repairs but tatty edges were removed by careful guillotine cutting. Luckily there was plenty of margin space to make this possible.