In the middle of Passover, 13 year old Hannah is magically transported back to the time of WW2, and everything goes exactly how you would expect. Absolutely everything. There's nothing here that's not telegraphed a mile in advance, but a plot doesn't have to be a mystery for a book to be worthwhile. Hannah gets back to her own time, having Learned a Lesson, but she's a sympathetic character and one can't help but feel for her. I have to say, though, that as - I don't want to say "likeable", because concentration camps don't make for likeable reading - but as competent as this book is, it's not a patch on the fantastic Briar Rose, also by Yolen, which has a similar theme and is admittedly directed at somewhat older readers. Perhaps if I'd read The Devil's Arithmetic as a kid, and before the other, it would have made a deeper impression. As it is, Briar Rose is the one I'd read again.