Jim McKelvey is the cofounder of Square and a friend of Jack Dorsey. This book is so fun and fundamental to the payments industry. You might learn how credit card networks extract a big portion of their revenue disproportionally from the small merchants if they, somehow managed to obtain a point of sales device. Square truly -not allegedly- brought democratization to payments and significantly eased the financial inclusion that hinders socioeconomic mobility. Credit card networks' dominance on payment acceptance or inclination to protect the status quo turn out to be a regressive force that renders the bigger a lot stronger. I would like to highlight how robust machine learning makes difference in risk scoring that results in seller inclusion, and more sales for the small companies. The book depicts exceptional entrepreneurs and how they transformed businesses and even societies. One of my all-time favourites. One may understand why Bitcoin attracted Jack Dorsey as well.