Set in the future, the second civil war is fought over abortion. To end the war, a compromise is reached that ends the practice of abortion but creates an alternative called "unwinding." Between the ages of thirteen and seventeen, parents or guardians can choose to have their children unwound, which involves having every part of their bodies harvested to be "donated" to another person so, technically, they don't really die. The complex and compelling plot follows three teens whose stories intertwine when they escape while on their way to the harvest camps.  Ages thirteen and up.