The Cervantes International Bibliography Online (CIBO)
http://www.csdl.tamu.edu/cervantes/english/biblio.html
is a comprehensive record of all significant books, articles, dissertations, reviews, and other scholarly materials related to Cervantes' works and life.
This is a "digital exhibit"
of translations and illustrations of Don Quixote. The exhibit features the holdings of the George Peabody Library of Johns Hopkins University. This would be a good resource for scholars who are interested in pursuing the "fetish of the text" and how this idea relates to Book I and its sequel.
This link
http://www.donquixote.com/english.html
will take you to the Don Quixote Web Portal Page. Here one can find John Ormsby's 1885 English translation of the novel. This is useful only for Ormsby's introduction which discusses the novel's controversial publication history in detail.
This is the link to Cervantes
http://www.h-net.org/~cervantes/bcsalist.htm
the official bulletin of the Cervantes Society of America. Academic essays dating from 1981 to the present are available at this website. An excellent source for students who are incorporating contemporary literary theory into their analysis. The articles are valuable if only for their extensive bibliographies.