Sticky notes.  We know they are useful for conveying information…

They can be good for taking notes…

But they can stain and leave adhesive residue…

The dyes are also not particularly stable…

Although some sticky notes are dang cute…they really can damage paper by bleeding onto the text block, leaving behind a sticky residue, or causing tears in  brittle paper when they are removed.

So please, if you use sticky notes in library books, please remove them as soon as you are finished with the book. That will reduce the damage down the road.