Spit in the Eyes of Fools

Seth Gingko has the fastest human-owned ship in the home galaxy. It has been pimped/souped up by plant hybrid cyborg aliens, and is invaluable to Seth's old employers, the MacCollie Company, and humanity as a whole.
But Seth has a problem. Through a technicality, he's out of contract, and he's stolen the ship.
But he knows he has get back to Earth with the information he's gained…
Aliens are invading the galaxy.
And there Seth yet has another problem. The Human races so far have not yet met any alien life in the galaxy.
How is Seth going to explain his way out of that one?
Simple.
He'll bring samples home…
That's where his problems start.