Well, one can damage a hardcover by not opening it properly the first time:
https://www.reddit.com/r/lifehacks/comments/7sry7v/open_a_ha...
(which was a lesson in 2nd grade, when we got our first-ever hardcover textbooks)
https://www.reddit.com/r/lifehacks/comments/7sry7v/open_a_ha...
(which was a lesson in 2nd grade, when we got our first-ever hardcover textbooks)
https://www.youtube.com/watch?v=HHe2hx1JL7U
For some reason, the lessons learned stuck with me.
Typical glued texts are more prone to this, but depending on the state of the glue, may go back so square if pressed when square to correct.
Oblig. XKCD:
(which I kind of wish was comic #1,000 so it was easy to remember/link)