re released films and reasons why they died down

http://www.horror-movies.ca/horror_16820.html

debate on horror films

http://www.filmreference.com/encyclopedia/Criticism-Ideology/Horror-Films-CRITICAL-DEBATES.html

history of horror

http://www.deutsches-filminstitut.de/collate/collate_sp/se/se_05.html

saw franchise

http://en.wikipedia.org/wiki/Saw_(franchise)#Merchandise_and_attractions

Saw

http://www.bbc.co.uk/news/entertainment-arts-10740518