Wittgenstein's Later Theory of Meaning: Imagination and Calculation
Hans Julius Schneider
Causation: A Very Short Introduction
Stephen Mumford
The Marxist Theory of Alienation
Ernest Mandel & George Novack
Markets in the Name of Socialism
Johanna Bockman
The Computer and the Brain
John von Neumann
Beyond the universal Turing machine
B. Jack Copeland & Richard Sylvan