I very much adore this series. It next book may break my heart! ( )

I very much adore this series. It next book may break my heart! ( )

This book is about two teenagers,Amy and Dan, who are trying to stop J.Rutherford Pierce from taking over the world. Amy and Dan are trying to find some riven crystal(sparked quartz) so they can produce an antidote to a devastating serum. I liked this book because it was intense and I learned more about Mayan stuff. I also liked it because I could never put it down. ( )

Dan is trapped, thinking he is about to die. He is counting on his sister Amy to help him. Amy has to encounter several obstacles to save her brother.