There wasn't too much information on The Hero and the Crown online but I did find a couple. One was the author's webpage and the other was basically just a summary of the plot line. There were no interactive sites that I could find, although I think that this book could be easily represented online, similar to the Briar Rose representation. I think that the story could be broken up into segments with images and sound that coincide with each segment. Since the story does follow a timeline and is sequential, it would be more difficult to break up into sections however, but I think with some slight modification to the text it could be done while keeping the storyline intact.
I did find a fun little trivia website where you could take quizzes over the story but nothing where you could read excerpts or chapters.