Genre: adventure/historical fiction Author: Mary Pope Osborne Description: This series is about a brother and sister who find a tree house and go on wild activities and end up in important times in history like Wars and the Titanic. They find magic friends like teddy, a child sorcerer. When they come back to their own time it is not a moment past the time they left. Most of the time an animal will lead them to the tree house. Also sometimes they leave something behind in the historical world and they find it on their door step back home ......... very mysterious. Critique: I really liked this book because I could learn history and have fun at the same time!!!!!!! Recomended for Grades:2-4