As the title of the book indicates, this is the story of how two brothers (Adolf and Rudolph) fell apart and ended up building two of the biggest sports brands in the world. And there's no shortage of drama - surviving through WWII, intense family bickering and one upmanship, secret deals, serial ownership changes, rising from the brink of collapses, etc. Through the journey, two personalities stand out (both Adidas side) - Adolf the master technician and very much the father of sports shoes, and his son Horst who not only grew the business & product lines exponentially but established the foundations of global sports marketing/sponsorships. Horst's influence in the appointments of Samaranch, Havelange and Blatter in their IOC and FIFA roles is unimaginable in the current day. We also see the appearance and meteoric rise of Nike and Reebok as sports giants in the US, as the German companies continued to ignore or fail repeatedly in the market.
The story could have been treated with a more coherent and engaging narrative though. There are a lot of characters and events introduced, and the middle parts read like a bland history book, before picking back up later. Also, this is more of a biography of Adidas, with Puma relegated to the sidelines after the initial stages.