http://www.aiga.org/
http://www.graphicartistsguild.org/
http://causticcovercritic.blogspot.com/
http://www.thebookseller.com/home.html
http://www.futurebook.net/
http://bookcoverarchive.com/
http://feedgrids.com/originals/post/beautiful_use_of_typography_in_book_cover_design/