The Sky Grew Dark (The End of the Golden Age Book 1)

The unthinkable has happened. Biological warfare has been unleashed on Americans and it seems their only choice is to flee or die. Struggling to survive, a family takes refuge in a cave by the sea.
Without enough time to properly prepare, they are running out of food and supplies far quicker than they had planned. It seems that all hope is lost until they discover there might be another way.