Game Design Textbook Recommendations

A student wrote me for advice on game design textbooks. I didn't go to design school, so I asked the industry professionals I knew on Twitter. They gave me the following recommendations (alphabetized):

Here's a recommended library for designers: 
http://www.boffo.us/gdw/BookshelfByTopic.html

Plus a crash course in hands-on design:
https://stacksocial.com/sales/the-name-your-own-price-game-design-bundle

If you have more recommendations, please suggest them in the comments.