This page contains a number of links which may be of interest to you. Some are related to hypertext, some are related to Jekyll & Hyde, and some are just general.
Enjoy!
Some Jekyll & Hyde Sites:
Perspectives on Dr. Jekyll and Mr. Hyde. Site created by Dr Martin Danahay. Professor of English. University of Texas at Arlington. Director: eCREATE Lab.
http://www.uta.edu/english/danahay/jekyllsite.htm
Eastgate systems are the home of hypertext fiction. They have software for creating it, and many stories, including Michael Joyce's afternoon.
http://www.eastgate.com/