I noted a few days ago that the list had passed 100 books. However, a number of categories contain more than one book, so I actually hadn't reached 100 categories.
As of today, I have 100 categories, using 141 books. I've also figured out how to make the Google data tables show up in a post*, so I'll celebrate by displaying a table of the duplicate categories:
***Of course, as soon as you do, Blogger completely ignores your line returns, and your posts run together. Like that above.****
****And I've already gotten sick of having to add br to every line in my posts. Not to mention it broke all the old posts. It would be nice if Blogger's parser would watch for script tags, and not insert br tags inside them.