Suffer the Little Children, Angel of Mercy Series #5

After accidentally learning of a planned assassination attempt on the life of President Ulysses S. Grant, Breanna risks her own safety to protect the country's leader. After receiving an award in Washington, Breanna comes across an "orphan train" heading west. As a special bond forms between Breanna, the children and the Lord, Breanna realizes the children's new family is not all that it appears.