I purchased these Audio CD's to help keep my Grandaughter interest in books. She struggles with reading and is behind for her age. She started out with the CD's and followed along with the books that we had purchased seperately. She played them over and over again. She just loves the stories. Before long I heard her reading the book on her own. I thought it was just from memory, but was quickly surprised that she was reading the whole book . These are all great stories read by the Author of the Books and keep kids very engaged! Since receiving these Audio CD's her reading level has jumped to steps or levels in school. I have already purchased 9-16 of the Audio CD's. Anything that helps children to love reading is a great tool. We have listened to them on short trips and the stories are easy to understand and fun to listen to. They also help you feel like you are part of the story and helping out Jack and Annie to solve the Mystery Adventures!