Nation - Terry Pratchett

Thirteen-year-old Mau is the only one left after a giant wave sweeps his island village away. But when much is taken, something is returned, and somewhere in the jungle, Daphne - a girl from the other side of the globe - is the sole survivor of a ship destroyed by the same wave. Together, the two confront the aftermath of catastrophe. And slowly, other refugees arrive - children without parents, mothers without babies, husbands without wives - all of them hungry and all of them frightened. As Ma