Products or ideas welcome!

I have a lot of wall space and want to maximize vertical storage for books, things I want on display. However, I don't want to make big holes or otherwise cause damage to the unit.

Thanks in advance!

Note: not my image. Got image from https://www.amazon.com/BAMFOX-Floating-2%EF%BC%8CNatural-Shelves%EF%BC%8CWall-Bathroom/dp/B07WRQ8892