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- Language: English
- Year: 1986

- Author: Kenneth Walker
- Language: English
- Year: 1975

- Author: Aldous Huxley
- Language: English
- Year: 1978

- Author: Andre Comte-Sponville
- Language: English
- Year: 2003

- Author: Stephen Jay Gould
- Language: English
- Year: 2001

- Author: Rich Cohen
- Language: English
- Year: 1999