Other Holocaust Books
After reading a number of Holocaust books (had to stop reading them as they got me feeling depressed), I would suggest the following:
For realism:
"I Have Lived a Thousand Years" by Livia Bitton-Jackson. It is a fictionalized account of the author's life between the ages of 13 and 14 (1944-45) when she was taken from her house, first sent to ghettos, then into many different camps such as Auschwitz, Plaszow, Ausburg, and Muhldorf/Waldlager. She experienced hell in most of them, barely staying alive--sometimes by sheer luck.
Not camp life, but life in hiding:
"The Upstairs Room" by Johanna Reiss. It is a fictionalized accound of the author's life in hiding starting when she is about nine-years-old. She has to live with her older sister (beginning at about 16) with at first one man, then a couple and the man's mother. The girls eventually spend nearly three years in hiding.
There are also two other books I know of that, like "Devil's Arithmetic", deal with going back in time (I haven't read them yet and thus cannot recommend them or dismiss them):
"Anne Frank and Me" by Cherie Bennett and Jeff Gottsefeld. A girl in 2001, fascinated by a Holocause survivor's tale, goes with her class on a field trip to the Holocause museum. After hearing gunshots in the museum, the students run and she falls and hits her head, waking up in 1942 Paris.
"if i should die before i wake" by Han Nolan. A modern day anti-semitic sixteen-year-old girl is seriously injured after a motorcycle accident with her boyfriend. After being taken to a Jewish hospital, she wakes up as a Jewish girl in Poland during the Holocaust.
Bob