This book covers Bitcoin’s blocksize war, which was waged from August 2015 to November 2017. On the surface the battle was about the amount of data allowed in each Bitcoin block, however, it exposed much deeper issues, such as who controls Bitcoin’s protocol rules. It is not possible to cover every twist and turn in the labyrinthine conflict or all the arguments, but I have provided a chronology of the most significant events. This book explores some of the major characters in the conflict and includes coverage, from both the front lines and behind the scenes, during some of the most acute phases of the struggle. The account in this book includes discussions with the key players from both sides during the war, exploring their motivations, strategy, and thought processes as the exhausting campaign progressed and developed.