A Bad Patch of Humanity — Dean Wesley Smith

Most of humanity died one ugly day four years before. Now the survivors wanted to rebuild.
Angie Park's job consisted of telling survivors outside of Portland, Oregon, of the plans to rebuild. But some survivors wanted nothing to do with civilization.
And some thought killing worth the price to pay to stay alone.
In the galaxy-spanning Seeders Universe, “A Bad Patch of Humanity” focuses down on an early event in Angie Park's life, an event that starts her on her path to becoming a woman of legend in a hundred galaxies.