Looking for bibliographic information about various works in these "great books" lists has lead me to some excellent web sites about authors, national literatures, genres, etc., including:
Pathways Through Literature, covering nine key Italian writers, from Dante to Giacomo Leopardi;
Modern British, Irish, and American Drama: A Descriptive Chronology, 1865-1965;
The Ladder: A Henry James Website;
and the official site for the Augustinian Institute, based in Malta.