He wrote that everybody in the team had forgotten about Sussman's copy and she is the one that told in a meeting the copy existed, to the astonishment of everyone else. The van that went to pick up the computer on Sussman's house was equipped with pillows because they were scared even from the road's vibrations.
edit: Now Im really curious what this version was even like considering it was never released
Roughly speaking the book validates the whole idea of "to build awesome stuff, hire the most creative and talented people you can find and create an environment for their imagination to run free". If you're interested in this perspective, I do very much recommend.
But, obviously, he doesn't address issues like John Lasseter running free with sexual harassment and other uncomfortable issues.
https://www.courthousenews.com/disney-to-settle-animators-wa...
If you are trying to read it purely for business advice or anything of that nature, you might find it a bit eh.
It is very heavy on telling an interesting story, which should explain rather well why it might not be the best for the purpose of being an educational material. But if you want an interesting delivery of the story of Pixar, along with a look at behind the scenes in the industry (e.g., Steve Jobs was featured in there as one of the important personalities, given he was heavily involved with Pixar) and behind some of the decision-making/philosophy of Pixar as a company as it was growing, it is a great and entertaining read.