Think I'm going to prune a lot of the books that I have in my game design / development bookshelf. Lots of them basically say the same thing without really adding much to the overall conversation.
That said I don't think I'll ever get rid of my Chris Crawford books. Literally opened up the book to the end of how he designed Eastern Front and his discussion about symphonic games gave me designing feels.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!