Merriam-Webster's Dictionary and Thesaurus
Merriam-Webster
The Linux Commands Reference Cheat Sheet
MakeUseOf
Berkshire Encyclopedia of Sustainability 1/10: The Spirit of ...
Willis Jenkins & Whitney Bauman
The Philosophy of Human Rights: Contemporary Controversies
Gerhard Ernst & Jan-Christoph Heilinger
Foucault's Pendulum
Umberto Eco
Political Writings
John Locke