From my daughter: I am 8 years old :), and I thought this was a really good book! I had pictures in my mind while I read the book, and I just wanted to keep reading and finish it right away!
Note: my daughter has more than once immediately delved into Magic Tree House books and finished them right away. I recommend this series to show the kids how great reading can be and how an author can make all of the difference in how enjoyable reading can be!!
When Jack and Annie found out that they were going to China, they went straight to the treehouse. They met Morgan there, and she told them that they had to save a library in China. The dragon king was going to burn all the books, because he didn't like them. Jack and Annie saw a huge map of the castle where the emporer lived and they used it to help them find the library