Bob Petersen arrives with his daughter at the Middle Grade school in Maine where he teaches, expecting another regular day but worried about what recent ominous news reports might portend. Suddenly his school -- along with many others across the United States -- is under attack. Gunmen burst in, slaughtering children and adults alike. This novella by New York Times bestselling author William R. Forstchen imagines a horrifying scenario where, in the course of one day, the terrorist group ISIS carries out massacres in schools and on highways across the United States. With a surprisingly small...