Kipuka Blues by Michael Warren Lucas

After extinction?

Politics.
Monsters.
Murder.

The alien Absolute eradicated Earth’s native life, replacing a fraction of it with alien duplicates. Kevin remembers the life of a police officer, but must find a new life in the bizarrely warped landscape of northern Michigan.

But even astonishingly resilient alien flesh breaks down, with enough effort.

Or enough electricity.

Absolute eradicated humanity. But his copies brought the worst parts of humanity with them…