From 11:00PM PDT on Friday, July 1 until 5:00AM PDT on Saturday, July 2, the Shmoop engineering elves will be making tweaks and improvements to the site. That means Shmoop will be unavailable for use during that time. Thanks for your patience!
Professor Binns is a ghost who teaches History of Magic. Besides being terribly boring, he doesn't have much of a character – which we guess is fair, because anyone who dies and then chooses to keep teaching History forever after must not have very much imagination.