I read his two books on making of the Xbox and Xbox 360, not only were they kinda poorly written (i suspect they were originally individual articles turned into chapters), they were poorly sourced and mostly just summarized publicly known information that he credited to his own interviews which consisted of him asking the people about those same things and them reconfirming it. IIRC, they also had quite a few basic factual inaccuracies. And I want to say in the first one he completely ignored Ed Fries, who was given the soul crushing task of finding first-party content and exclusives like six months after he should have been and with few resources and a requirement to not grab
any PC ports, and yet he still pulled off stealing Bungie AND saved
Crimson Skies twice. (No, I am not biased solely because of the latter. It totally makes up for Nightcaster, Blood Wave, Azurik, Amped, etc.)
I remember the first book basically being about how Seamus Blackley built the entire Xbox himself and spending pages upon pages on discussing failed controller prototypes without ever talking about what the end result was. (One of my favorite unconfirmed stories about this was that the controller was part of yet another Microsoft Turf War, the Sidewinder group was basically dismissed from assisting for no clear reason, early dev kits shipped with a Hammerhead controller.)
Game Over continues to be the only good video game mass market history ever published probably.