This book is about two children that go back in time when summond to help their ansester that lived over 100 years back. They are asked to go to the 13th Floor and there they go back in time. This is a really cute book. The plot is easy to flow yet not totally predictable. It's easy to read and I think you will really enjoy this. I think it is better than Sid Fleischman's other book, The Whipping Boy.