The Dream Machine: J.C.R. Licklider and the Revolution That Made Computing Personal by M. Mitchell Waldrop. It's a very fun, easy, and interesting read of the origins of modern computing, the people who worked day and night to make their vision a reality, and the passion that carried their dreams to reality (the book, besides mentioning Joseph Carl Robnett Licklider, also names people from Grace Hopper to Steve Jobs and Bill Gates).