The Devil's Arithmetic, by Jane Yolen, is an historical fiction novel about the Holocaust, geared toward younger readers. Thirteen-year-old Hannah is on her way to celebrate Passover with her family, but she'd much rather stay with her friend Rosemary, eating Easter candy. She feels like every year, the Seder is the same - they do the Seder ritual with dinner and the adults talk about the past, and how important it is to remember. Hannah doesn't want to talk about things that happened so long ago, and she gets bored of her family's stories.
When her Grandpa Will declares that she will be the one to open the front door for the prophet Elijah this year, Hannah feels silly, but she goes along with the tradition. Upon opening the door, however, she doesn't see the apartment building's hallway and the doors to the neighbors' apartments - instead, she finds herself transported to another time and place. She has, in fact, been transported to Poland of the 1940s, where she will come to experience for herself the horror of the stories she used to dismiss.