This article is from the rec.arts.sf.written FAQ, by Evelyn C. Leeper evelynleeper@geocities.com with numerous contributions by others.
The best list I've found is at
http://www.lasfs.org/lasfs/what/projects/rrl/. It includes science
fiction and fantasy. The list itself has links to discounts, and the
site has a couple of articles explaining how it came about.
Note that it predates J. K. Rowling and the "Harry Potter" books, which
is what made me add this question, but I don't think most people need to
be told about them. :-)
 
Continue to: