If a book cover has raised lettering, metallic lettering, or raised metallic lettering, then it is telling the reader: Hello. I am an easy-to-read work on espionage, romance, a celebrity, and/or murder. To readers who do not care for such things, this lettering tells them: Hello. I am crap.
Books
If you grew up in a rural area, you have seen how farmhouses come and go, but the dent left by cellars is permanent. There is something unbreakable in that hand-dug foundational gouge into the earth. Books are the cellars of civilization: when cultures crumble away, their books remain out of sheer stupid solidity.