Library: Among the thousands of ancient, musty books at the Hogwarts library, Harry and friends struggled to find information about the mysterious wizard Nicolas Flamel. They would have fared better in Harvard’s Houghton Library, the rare-books collection that houses works on witchcraft, alchemy, and botanical lore — and a medieval manuscript in the hand of the real-life Nicolas Flamel, a 15th-century Paris alchemist and scribe.