Playground Mars (Project Elonia Book 1)

Elonia was supposed to be a vacation for the Swansons, but eight years later Sally's imprisoned on the moon, Tony's trapped in a mining accident, and their daughter Tally is out on her own with the rights to the richest plot of land in the solar system. Armed with nothing but her wits and a cheerful AI companion, it's up to Tally to save the day.