The mobile payment company Square was a game-changer. It slashed the costs of taking credit card payments — allowing small businesses and artisans to get into the game without having to pay sizable percentages of their transactions to processors. In retrospect, it seems like a no-brainer.
But in 2009, it was just an idea — one born of frustration when St. Louis glass blower Jim McKelvey lost a sale after being unable to take a credit card payment. After McKelvey shared his idea of a better way with his former intern, Square was born. (It helped, of course, that the intern in question was Twitter co-founder Jack Dorsey.)
How Square went from an inkling to an industry disrupter is the subject of McKelvey’s compulsively readable new book, “The Innovation Stack: Building an Unbeatable Business One Crazy Idea at a Time.”