It's a library book, folks! You wouldn't do that to a friend's book, would you? If you must add markings, please do them lightly in pencil, and never use ink or marker pen!
At least if you use a pencil, you can spend a couple of minutes with an eraser when you've finished.
"Gonnae No Dae That" is a Glasgow colloquialism from the TV comedy series, Still Game. It means, don't do it!