Principia Ethica
G. E. Moore
The World as Will and Idea (Vol. 2 of 3)
Arthur Schopenhauer
On Inductive Logic
Rudolf Carnap
Indian Philosophy: A Very Short Introduction
Sue Hamilton
In the Beginning...was the Command Line
Neal Stephenson
Cryptography: A Very Short Introduction
Sean Murphy & Fred Piper
Beyond the universal Turing machine
B. Jack Copeland & Richard Sylvan