Princeton, NJ: Princeton University Press, 1992. Black cloth. pp 285, index. Fine in fine jacket. Draws on history and philosophy of science, cognitive psychology, and the field of artificial intelligence to develop a theory of conceptual change capable of accounting for all major scientific revolutions.

Amsterdam: North-Holland Publishing Company, 1965. Yellow cloth. pp (xviii), 326. Fine copy. Jacket has nicks at head of spine, VG+ otherwise.

Ithaca, New York: Cornell University Press, 1986. Grey cloth. pp 278. Index. Fine in fine jacket. "This book analyzes the relationship between metaphysics and epistemology in the thought of(René Descartes."

Leipzig: F.A. Brodhaus, 1881. Later printing of the 3rd edition (1860). (First edition was in 1841). Octavo, original black cloth patterned in blind, spine gilt lettered. xlii, (276) pp. Short tear to lower spine fold; one inch of wear to lower edge of front cover ; inner hinges partially cracked but firm; VG otherwise.

Princeton, NJ: Princeton University Press, 1993. Brown cloth. pp 286. Index. Fine in fine jacket.

Toronto: Viking, c1996. Third printing. Octavo, softcover, card cover with flaps. Signed by the author. VG copy. Author is a Toronto philosophy professor.

London: William Tegg, 1850. Octavo, pp [2], (xii), 602, [4]. Contemporary brown calf with gilt and blind decorative borders to sides, spine with four raised bands, black label, gilt ornament, marbled page edges and endpapers. Arms of Marishal College, Aberdeen. Binding by A. Brown, Aberdeen. Rubbing in panels of spine, else fine, joints and hinges not cracked, no owner names. Pagination is continuous for the two parts. Stewart was a Scottish philosopher and mathematician best known as a popularizer of the Scottish Enlightenment, especially through his lectures at Edinburgh University. Nice copy.

New York: Routledge, 1989. Black cloth. pp (xii), 197. Index. Fine in fine jacket. "In Emotions and Reasons, Patricia Greenspan offers an evaluative theory of emotion that assigns emotion a role of its own in the justification of action. She analyzes emotions as states of object-directed affect with evaluative propositional content possibly falling short of belief and held in mind by generalized comfort or discomfort." In print (2018) at USD 140.00

Dordrecht, Holland: D. Reidel, 1976. Blue cloth. [8], 440 pp + ads, indexed. Light endpaper yellowing from binding, else fine, no jacket. Synthese Library Volume 72. Published price about 300 dollars.

London: Allen & Unwin, 1970. Maroon cloth. pp 156, (4, ads). Minor rubbing at foot of spine, else fine in near fine jacket, no owner marks. Muirhead Library of Philosophy.

London: James Clarke, 1913. Olive cloth gilt lettered. pp 223, [1], 36, ads. Yellowing to page edges; yellowing and foxing to endpapers; ink name at front; spine has some shellac and evidence of removed call numbers; a good, clean and unworn copy otherwise. New short Introduction for this ediion noting that the bibliography has been greatly enlarged. Useful checklist at rear of books by and on both philosophers.

London: Routledge, 1988. pp xvi, 179. Index. Green boards. Fine in fine jacket.

Albany, NY: State University of New York Press, 1977. Grey cloth. pp xxxvi, 206. Index. Minor foxing to free endpapers, else fine, no owner names. Dust jacket has internal damp stains and one short tape repair at spine, VG otherwise.

Dordrecht, Holland: D. Reidel, 1965. Dark blue cloth. pp viii, 123 Band of offset yellowing to free endpapers, else fine. Dust jacket has a small rubbed tear to upper inner corner of front panel, light yellowing to spine, panels lightly dusty, VG otherwise.

Cambridge: Harvard University Press, 1997. Second printing. Card covers. pp 464, index. Fine copy.

Bloomington: Indiana University Press. c1990. 2nd printing. Octavo, red cloth, pp 406. A fine, jacketless copy, no owner names. Hardcover out of printing. Paperback edition in print (2017) at USD 30.00

Bloomington: Indiana University Press, 1987. Red cloth, pp 406, index. Fine copy, no owner marks. Dust jacket has creases at foot of spine, else fine.

Bloomington, IN: Indiana University Press, 1989. Second printing. Blue cloth. pp (xx), 329. Glossary. A fine, jacketless copy.