"Stones in Water" by Donna Jo Napoli
When Roberto Sneaks off to see a Movie in his small Itialian village he has no idea that life as heknows it is over. german soldiers raid the theater round up the boys in the audience and pack them onto a trian. After a terrifying jorney, Roberto and his best friend Samuele find temselves in a brutal work camp, where food is scarce but horror is everywhere. The boys vow t stay together no mater what. But Samuele has a dangerous secrete which if discovered could get them both killed
(taken from back cover)