Oxford Companion to English Literature, Main, PR 19 .O94 2006 and older editions. Short entries on people and topics, with minimal further reading references.
Cambridge History of Medieval English Literature, Main, PR 255 .C35 1999.
Greenfield, New Critical History of Old English Literature, Main, PR 173 .G73 1986.
New Pelican Guide to English Literature, Vol. 1 pt. 2, Medieval Literature, the European Inheritance, Main, PR 85 .F6 1982 v. 1 pt. 2.
Historical Dictionary of British Theatre, Early Period, Main PN 2581 .G73 2013
New Oxford Companion to Literature in French, Reference, PQ 41 .N48 1995 Short entries on people and topics, with minimal further reading references.
Dictionnaire des Litteratures de Langue Francaise, Main PQ .D533 1984 v. 1-4. Covers medieval literature to contemporary times. Signed entries. Entries on topics, authors, themes. Entries for major authors are very full and include bibliographies.
Feminist Encyclopedia of French Literature, Main PQ 149 .F47 1999. Topical and biographical entries with bibliographical references for further reading, including both works by the authors and works about them and their works.
New History of French Literature, Main, PQ 119 .N48 1989 (rpt. 1994). In English. A French language edition in Main, PQ 119 .N4814 1993.