http://www.c-spanstore.com/american-writers.html
C-Span American Writers series

Elmira College Center for Mark Twain Studies
http://www.elmira.edu/academics/ar_marktwain.shtml

American Literature Survey Site
http://www.cwrl.utexas.edu/~daniel/amlit/survey.html

Public Broadcasting Special on Mark Twain, by Ken Burns
http://www.pbs.org/marktwain/

The website of the Mark Twain Forum
http://www.yorku.ca/twainweb/