Fire

It begins with the end...

When Megan Pritchard clocks in for her shift, she has no way of knowing it will be her last. Struck down by what she believes is a fast-moving stomach virus, she has her first encounter with the new zombie plague. It won't be her last.

Thirty-five thousand feet above central Kansas, airline pilot Mike Pringle has his own problems. When the zombie infection spreads through the cabin of his Boeing 757 and air traffic control stops responding, he is forced to confront the unthinkable - an airplane full of cannibalistic monsters and nowhere to land.

In the middle of the Pacific Ocean, submarine captain Betty Hollister receives an Emergency Action Message (EAM) unlike any other. With orders to fire upon the very country she has sworn to defend, she alone is the last line of defense against the zombie uprising.
 ...
In the twilight of a shattered civilization, the fate of humankind rests upon the actions of a handful of war-weary survivors. Driven to a scorched and decimated corner of the former United States, they alone hold the key to a global reawakening.

Or the final epitaph for a dead planet...