Mirror Worlds: Or the Day Software Puts the Universe in a Shoebox: How It Will Happen and What It Will Mean David Gelernter Oxford University Press, October 1991 Also available in hardback.

Being Digital Nicholas Negroponte Knopf, January 1995 Also available in hardback.

An Introduction to Information Theory : Symbols, Signals and Noise John R. Pierce Dover Publications, June 1980 Today's world can't be understood without a grasp of information theory. This little Dover book is a good introduction--not too weighty, not too light.

Introduction to Communication Studies (Studies in Culture and Communication) John Fiske Routledge, November 1990