Too many times, I saw teams wanting to pursue unusable and inaccessible designs because Amazon, Google or Apple was doing it. Here's a concise article from Nielsen Norman Group on why those companies aren't always worth emulating.
This article (it's not a proper book) wrote by Gareth Ford Williams has several different quips, tips, affirmations, and truth that worth to be read and read again.
Illustration: Gareth Ford Williams
My friend, Nicolas Steenhout, published a few years ago a story about how his mechanic discovered why accessibility is good for business.
Wow that is a super nice initiative! Marcy Sutton offers a free six weeks email course to help you building and testing accessible web applications.
JoLynne Martinez, like many developers or designers, heard about web accessibility only once in the field. Her story reflects the common experience met by people who want to start doing accessible code or design: finding some help and resources adapted for beginners.
Rian Rietveld, an accessibility specialist, asked to non-disabled people what are their greatest frustrations and hurdles are while using the web. Spoiler alert: everyone benefits from an accessible web!