The Challenge: Read a book from every Dewey Decimal category.
This sounds like fun! How do I start? There's a list of the categories here. You can find the Dewey Decimal numbers of many books in the Details section of their LT Work page, and you can also add a Dewey Decimal column to your catalogue that will show the numbers from other people's catalogues if you don't have that data yourself. Then click "Post a new topic" and start listing what you've read!