So, I've discovered a delightful 'little' novel named Marienbad, My Love for short (the full title is 61 pages long). It's supposed to clock in at over 10 million words, making it the longest novel ever written. I'm already on page 15 of the first part, and I think I'm going to try and read the whole thing. It can't be any worse than A Study In Scarlet, anyway.
http://marienbadmylove.com