This book is part of a series that follows two children who must help a librarian from another dimension save her library. They do this by time-traveling in a special tree house. In this particular book, the children are given the task of retrieving a certain piece of literature from the great earthquake that took place back in San Francisco, California, in 1906. Throughout the story, the siblings attempt to save as many people as possible, and through their kindness they find the piece of literature they need.
I would highly recommend this book for many reasons. First of all, it’s a long series, so those reading it have a lot to read through before finishing. Second, it’s entertaining to read, who doesn’t love magic tree houses, amazing adventures, or inter-dimensional librarians? And finally, it exposes children to a wide variety of history in a fun manner. I honestly didn’t even know there was an earthquake in 1906 in California, and while I’m certainly not an expert, I have a better understanding of something I didn’t before.