Loophole in Bloomington, MN

Don't poke your nose down a wormhole - you never know what you might find.
Two universes joined by a wormhole pair that forms a 'loophole', with an icemoon orbiting through the loophole, shared between two different planetary systems in the two universes.
A civilisation with uploaded minds in virtual reality served by artificial humans.
A ravening Horde of replicating machines that kill stars.
Real humans from a decrepit system of colony worlds.
A race of hyperintelligent but somewhat vague aliens.
Who will close the loophole... who will exploit it?
Cover design: David A. Hardy