Take Back Plenty - Robert Greenland

It is carnival time on Mars, but Tabitha Jute isn't partying.

She is in hiding from the law, penniless and about to lose her livelihood and her best friend, the space barge "Alice Liddell". Then, the intriguing Marco Metz offers her some money to take him to Plenty, and then the adventure begins. A fast-moving space adventure featuring mysterious aliens, a journey to a de-populated planet, a mad run from space cops, a ship captain in trouble, and her AI companion/ship's computer.