The Wrath of Cons by Robert Kroese

Interstellar con man Rex Nihilo and his long-suffering robot sidekick Sasha are back, and they’re neck-deep in their most outrageous scam yet: selling black market planets!

Terraforming uninhabitable planets and selling them to criminals right under the nose of the repressive interstellar Malarchy is good work if you can get it, but there’s a price: as the pair’s profits soar, they find themselves on the run from… well, pretty much everybody. Rex and Sasha hop from planet to planet, with nothing but their wits and a motley crew of loyal friends to keep them alive.

But when their antics draw the attention of an ancient intelligence determined to wipe humanity from the galaxy, they put their moneymaking plans on hold–and team up with their biggest rival–to save the galaxy once again.