Chisholm, R. (1966/1977/1989) Theory of Knowledge, Englewood Cliffs, NJ: Prentice Hall, 1st, 2nd and 3rd edns. (The successive editions contain a general introduction to many issues in epistemology and increasingly complex foundationalist accounts of knowledge, along with versions of the defeasibility account. The first edition is a good place to begin a study of contemporary epistemology.)

Gettier, E. (1963) 'Is justified true belief knowledge?', Analysis 23 (6):121-3. (This article was responsible for focusing attention on the inadequacy of characterizing knowledge as true, justified belief. Many of the most interesting contemporary issues in epistemology can be traced directly or indirectly to this article.)

Lehrer, K. (1990) Theory of Knowledge, Boulder, CO: Westview Press. (An accessible introduction to the fundamental questions in epistemology that defends a version of coherentism as supplemented by the defeasibility account.)

Luper, S. (2004) Essential Knowledge: Readings in Epistemology, New York and Oxford: Pearson Longman. (An accessible collection of classical and contemporary essays on a wide variety of issues in epistemology.)

Moser, P. (2002) The Oxford Handbook of Epistemology, Oxford: Oxford University Press. (A collection of contemporary articles on a broad range of topics in epistemology.)

Sosa, E. (ed.) (1994) Knowledge and Justification, vols 1 and 2, Brookfield, VT: Ashgate Publishing Company. (A comprehensive set of contemporary essays in epistemology.)