FUTURE ADVENTURES OF SIENNE VHARTAN by Tyree Campbell

Sienne Vhartan, an alien from Valange, has been deliberately marooned on Earth after being sent there seven centuries ago to study Earth’s civilizations. Now that things have fallen apart, and civilizations no longer exists, she wants to go home. To do that, she needs someone who is skilled at fixing things—so she thumbs a ride with Kevan Duffy, an incredulous ne’er-do-well on his way back to his cave. Promised physical and mental enhancements in return for his assistance, he agrees to help her.

Once in space, they fight injustice, slave trafficking, toxic waste, and bureaucracy, with devastating but dangerous effect. The road is bumpy and log-jammed, and survival is never guaranteed. But when did that ever stop Sienne?