Deductive Logic in Natural Language
Douglas Cannon
Historical Dictionary of Descartes and Cartesian Philosophy
Roger Ariew & Dennis Des Chene & Douglas M. Jesseph & Tad M. Schmaltz & Theo Verbeek
Roget's International Thesaurus, 6th Edition
Barbara Ann Kipfer
The Philosophy of the Moral Feelings by John Abercrombie. (Physician)
John Abercrombie
The Consolations of Philosophy
Alain de Botton
Melchizedek and the Mystery of Fire
Manly P. Hall