As the person in charge of the chess on Chess.com, Rensch organises events and dreams up innovative formats. He finds commentators and streamers. Most critically, given the prize money, it is his responsibility to perform the key task of weeding out cheats with least fuss.
Until Covid, the site was moderately profitable. Then, membership exploded. It grew exponentially again, when the Queen's Gambit aired. It continues to grow, albeit at a slower pace. It has also spawned an ecosystem that includes other high-traffic chess websites, high-value streaming channels, online coaching, and so on.
The book deals in detail with one of the most infamous cheating scandals, with its account of the Hans Niemann – Magnus Carlsen face off in 2022, seen from the perspective of Rensch and Chess.com. (The book was written and published before the other “quasi-cheating scandal”, wherein the late Grandmaster Danny Naroditsky was hounded and cyberbullied after repeated, unfounded accusations of cheating by former world champion, Vladimir Kramnik.)