He also was hired at Apple in April. ~2k Apple employees then signed a letter condemning his hiring after excerpts of his book circulated. This wasn't so much a Twitter mob resurfacing an old book, as a group of Apple employees using a published work to criticize the hiring of a new manager.
https://www.cnn.com/2021/05/13/tech/apple-antonio-garcia-mar...
Edit: Well, it seems that, according to Wikipedia, the impetus might have been an article in tech media (which seems to mean anti-tech media these days).