what do you think about phantom of the opera? the original was a little clunky, but if you liked the story then you could check out Phantom by Susan Kay. It has all the fun of the original story plus some nice background info on Erik's life- The Phantom feels less mysterious, or at least his insanity is developmentally explained.
check it out on amazon, near 5 star rating.
oh ya it's basically the same story-very dark and hopelessly romantic, but not depressing. If anything it is fun and heart wrenching. What a sweet story.