Apparently, because I've just signed up for the 10-10-10 Challenge organized by Twitter-buds Kalen and Melissa.
So by October 10, the goal is to read 10 books from each of these categories:
4. Contemporary young adult
5. Children's non-fiction
6. Science fiction
9. Written before 1900
10. Pulitzer winners
Let's see if I can do better than the last challenge I signed up for.