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!
Hop on over to the "Characters" section to read about the Katherines. They're less like real characters and more like symbols disguised as characters and, considering the title of the book, you probably want to spend some time acquainting yourself with them.