Flash Morgan on the Moons of Jupiter

He gave away the blueprint. Now four thousand people are alive because of it - and two governments want to take what they built.
Test pilot. Engineer. Accidental revolutionary. Flash Morgan has been to Venus. He's been to Mars. Both times, he went in with nothing but a ship, a mechanic, and an unreasonable amount of conviction - and both times, someone made him surrender something afterward.
The Star-Spangled Comet is in federal impound. His accountant is in court. Flash is in a Pasadena hangar, building something that may or may not violate his court order.
Four generations ago, seventeen Maker families escaped Mars, choosing a road no one had mapped. They found Europa. They found survival. And two years ago, they found a fuel cell schematic published in the middle of the night by a girl with a poster of Flash on her wall who believed that knowledge belongs to everyone.

She wants Flash to save them.

Flash Morgan on the Moons of Jupiter - the breathtaking conclusion to the trilogy that asked what happens when the thing you gave away turns out to be the most important thing in the solar system.