This recommendation is way overdue, and I apologise for taking so long to post it. John Kearns, formerly an editor here at the Lexicon, is putting together a fantastic reader’s guide to the Harry Potter series called The Harry Potter Companion. The Companion offers commentary on each chapter of the books (currently covering the first three books and part of the fourth) and showcases fan artwork which illustrates each of those chapters. Take a look for yourself, don’t just take it from me. The site will win you over the moment you click on that first link.