The Innovators: How a Group of Hackers, Geniuses, and Geeks Created the Digital Revolution. BY WALTER ISAACSON. Simon & Schuster, 2014, 560 pp. $35.00. Zero to One: Notes on Startups, or How to Build the Future. BY PETER THIEL WITH BLAKE MASTERS. Crown Business, 2014, 224 pp. $27.00.