Historical Novel-The Devil's Arithemetic-Jane Yolen

Hannah is a Jewish thirteen year old girl celebratinga Jewish holiday with her family, but when she opens the door taht should face the ahllway she finds herself in the 1940's in a Polac family preparing itself to the marriage of her "uncle". Hannah now finds herself called Chaya and in a century before her one. Chaya/Hannah is very scared and because she didn't want to become identy mad and everybody told her she had a high fever and her life as Hannah appeared as a dream Hannah starts to live as Chaya, with her uncle and aunt and her new friends. Slowly teh pass on and the day in which the Nazi bring her and her family and friends away arrives. Little helps taht Chaya knows what will happen to them because noboy would follow her and would listen to her so she finds herslef with her beloved ones in a Concentration Camp. Her life in the Camp is hard she sees who she loves being killed and meets Mengele that takes her nearly cousin away forever, he was only four. Chaya grows up in this camp between difficulties and sadness until her life arrives at a point where she has to decide. A gurad caught her and her friends not working and tells three of them to go in one of the Crematory Ovens. Chaya is saved. But was this the right thing to do? She quickly thought and gave her clothes to her best friend Rose, she had her memories and Hannah and Chaya, what did Rose have? While she walks in the Crematory Oven she finds herself again in the 20th century with her family. She notices quickly her aunt's Rose number and realises that she was the Rose taht herself as Chaya gave teh life to.