This series of adventures captivated my two boys of eight and ten years. We learn a lot without getting bored. If your child is not going to read every story is exactly the right size for evening reading and captivate parents as a child. After each chapter, but it is frustrating to have to stop as we desire to know the future. I will read the first chapter to my son who rush to read more for themselves! This series of books tell the various adventures of a brother and sister, Tom and Lea, starting with the discovery of dinosaurs in prehistoric times - describing what they look like and what they do - through a trip to the moon, or an incursion in ancient Egypt ... The author, Mary Pope Osborne, knew how wonderful and smart mix real events. I had never imagined that the history of our world can be written so simply and captivating !! If you think buying these books, ready to answer any questions you inevitably ask your child and be prepared to buy the No. 11 currently for sale !! The whole family will want to know the further adventures of Tom and Leah.