"Like Water on Stone," by Dana Walrath.

It is 1914, and the Ottoman Empire is crumbling into violence. Beyond Anatolia, in the Armenian Highlands, Shahen Donabedian dreams of going to New York. Sosi, his twin sister, never wants to leave her home, especially now that she is in love. At first, only Papa, who counts Turks and Kurds among his closest friends, stands in Shahen's way. But when the Ottoman pashas set in motion their plans to eliminate all Armenians, neither twin has a choice. After a horrifying attack leaves them orphaned, they flee into the mountains, carrying their little sister, Mariam. But the children are not alone. An eagle watches over them as they run at night and hide each day, making their way across mountain ridges and rivers red with blood.