Survival Kit is an advanced book that dives into the deep end, The Illusion Of Life by Frank Thomas and Ollie Johnson [1] (two of the guys on a bunch of the early Disney features) and Cartoon Animation by Preston Blair [2] (countless MGM shorts) will give you a solid grounding in the basics.

The whole article focuses on expanding a list of principles of animation from Illusion.

1: https://www.amazon.com/Illusion-Life-Disney-Animation/dp/078...

2: https://www.amazon.com/Cartoon-Animation-Collectors-Preston-...

One i'd recommend is The illusion of life - the history of animation in disney, it covers some of the business, the people and the techniques and of course the movies, and it's one of the most beautiful books I own. https://www.amazon.com/Illusion-Life-Disney-Animation/dp/078...