The SE books are two book collections from the Earth's Survivors series.
The Earth's Survivors books follow survivors of a worldwide catastrophe. A meteorite that was supposed to miss the earth completely, hits and becomes the cap to a series of events that destroy the world as we know it. Police, fire, politicians, military, governments: All gone. Hopes, dreams, tomorrows: All buried in desperate struggle to survive. From L.A. To Manhattan the cities, governments have toppled and lawlessness is the rule.
Los Angeles: Billy and Beth start out with a small group and wind up on their own as they make their way across America trying to find others and safety.
Manhattan: Adam leaves the safety of his apartment to find his way out the dying Manhattan, gathering others as he makes his way.
Old Towne New York: Conner is alone for the first few weeks, but then he finds Katie and a reason to live again. They set out to survive and find much more than survival.
Watertown New York: Mike Collins goes to sleep thinking about his first vacation in many years that he will start in the morning. He awakens to destruction.