suggestions?

I'm working on my final project for my theme class. My topic is Gothic Elements in Children's Literature. I've chosen four novels to highlight - two classic, two contemporary: The Secret Garden, Alice in Wonderland/Through the Looking Glass, Coraline, and the Harry Potter series.

As an appendix, I want to include a list of other works of children's literature that have Gothic elements in them. I'm thinking of things like A Series of Unfortunate Events, The Spiderwick Chronicles, etc. Any and all suggestions welcome - classic or contemporary. The more the merrier, as long as it's children's lit.

Also, if I were to highlight just one of the Harry Potter books for its Gothic elements, which do you consider the most promising? I could do all seven, but that might be overkill.

If I can figure out how to post my PowerPoint presentation on blogger, I will.

Thanks.