I usually don't read books from series that are really long like this book, but I really like science fiction, so I read it anyway. This book caught my interest right away. I also read it because Amy is a gymnast and I am a gymnast.
Amy all of a sudden is able to do things she has never been able to do before. She can do gymnastics tricks that she has never tried and she is also smarter. She thought she was just a normal kid, but it turns out that she is a clone made by scientists in a factory.
Overall, this book was really good for a series book. It's not as good as books by Margaret Peterson Haddix or Carline Cooney, but it is still pretty good and I couldn't put it down. One bad thing is that Amy has to quit gymnastics so that no one knows she is special.