I'm Climbing Up Those Walls Again

... I've been writing in this blog since July 2002. I just checked my user stats and found that this post will be #191, and I've written 26,796 words since the start. That's enough to fill a book, although not a very interesting book.

I have a question, if you had to write something that was 26,000 words long, starting now, what would you write it about? Assume you can't do any research for it beyond your own and general knowledge.