BloomsburyMagazine Research Centre
Offers literature reference searches powered by bloomsbury reference books.
http://www.bloomsburymagazine.com/ARC

Book Sale Finder
Guide to used book fairs and sales across the USA.
http://www.BookSaleFinder.com

Centre for the History of the Book
History, projects, and events.
http://www.arts.ed.ac.uk/chb

Creative Nonfiction Magazine
Journal includes online essays and book reviews as well as links for the Goucher College MFA in Creative Nonfiction.
http://www.creativenonfiction.org

International ISBN Agency
Includes a user's manual, prefix ranges, details of group agencies, publications, reports, and news.
http://isbn-international.org