Harry Potter and the Half-Blood Prince

Top 10 things I liked about Harry Potter and the Half Blood Prince:

1. JKR continues to add dimensions and depth to her fantasy world.
2. The large cast of characters.
3. References to things mentioned in earlier books.
4. It's funny.
5. It's sad.
6. There are a ton of things to speculate about for Book 7.
7. Snape.
8. Potions class.
9. Harry, Ron and Hermione.
10. Names of people and places, such as Slughorn.

I didn't think I could do a top 10 list without a spoiler, but I think I managed!