That's what Jack and Annie get when the Magic Tree House whisks them back to California in 1906. As soon as they arrive, the famous San Francisco earthquake hits the city. Can Jack and Annie find the final writing that they need to help Morgan save Camelot? Or will San Francisco be destroyed first?

Your head will spin when you read ...

One summer day in Frog Creek, Pennsylva-nia, a mysterious tree house appeared in the woods.

Eight-year-old Jack and his seven-year-old sister, Annie, climbed into the tree house. They found that it was filled with books.

Jack and Annie soon discovered that the tree house was magic. It could take them to the places in the books. All they had to do was point to a picture and wish to go there.

  Prologue

1. Tweet-tweet

2. Thunder Under the Ground

3. The Great Shake

4. What's the Story?

5. Stop! Stop!

6. Something to Lend

7. Dynamite!

8. Good Luck, San Francisco!

9. The Wonderful Room

10. The Mystery of Morgan's Library