Sing Down the Moon is an incredible portrayal of a (yet another) nasty snapshot of United States history involving the treatment of various Indian tribes in the west. O'Dell follows a young Navajo girl throughout her daily chores of herding sheep, when she is captured by Spanish slave traders, being reunited with her tribe, and their subsequent "relocation" (along with hundreds of thousands of other Native Americans). I tell you, the way the Indians were treated by the US Government in the 1800's was despicable. There are prominent and eery similarities between the Holocaust and the Trail of Tears or The Long Walk.
I definitely anticipate using this with students. The way Sing Down the Moon is written presents students with a rare inside look into this aspect of American history.