Read an excerpt from AMISH GRACE: HOW FORGIVENESS TRANSCENDED TRAGEDY by Donald B. Kraybill, Steven M. Nolt, and David L. Weaver-Zercher.

Bob Abernethy interviews author Steven Nolt, a history professor at Goshen College in Indiana, about the one year anniversary of the tragedy in an Amish schoolhouse in Nickel Mines, Pennsylvania, where a gunman murdered five girls and severely wounded five others before killing himself.