The author is from Germany, so the original title is Rubinrot, and they have the first movie in German ( the book is a trilogy ). It is really good. It's about a girl named Gwyneth Shepherd, a 16-year old student who is in a time traveling family. Who ever has the time traveling gene, can travel back in time. She is from the Montrose side of the family, the other side is the de Villers ( the male line ). They keep it a secret from the rest of the world. Gwyneth's ignorant cousin who has the time traveling gene, has trained all her life to go back in time. Then, one day, Gwyneth figures out that she has the time traveling gene...