J.K. Rowling's Official Website
This website provides biographical information and Harry Potter facts written by Rowling herself. The site also includes fascinating details about Rowling's process of writing Harry Potter and decisions about how to shape certain characters.
The Harry Potter Lexicon
Boasting to be the "most complete and amazing reference" to Harry Potter, this website includes scholarly essays on the Harry Potter series, as well as more imaginative elements, such as a detailed timeline of the wizarding world, an atlas of locations discussed in Rowling's books, and wizarding family trees.
Harry Potter Facts
http://www.harrypotterfacts.com
Another fan-based reference site, this website provides bare-boned summaries of individual book chapters as well as a specific indexing system that tracks and identifies characters/spells/animals/etc. in terms of the specific chapters of each Harry Potter book in which they appear.
Harry Potter Criticism
http://danny.oz.au/books/notes/harry-potter-criticism.html
This website provides links to critical literary reviews of the Harry Potter series, some of which (for example, those under the "Harry Potter is Satanic witchcraft" header) provide a glimpse of the wide range of responses to Rowling's work.
Harry Potter's World: Renaissance Science, Magic, and Medicine
http://www.nlm.nih.gov/exhibition/harrypottersworld/
This website/library exhibition discusses the mythological and scientific origins to the magical world described in Harry Potter. In addition to describing the real-life versions of elements described in Harry Potter, the site includes a thorough bibliography of scholarly books and articles for any reader who wants more detail about the historical influences of Rowling's work.
