Galactic Freighter — Kenneth E. Ingle

Spacer Buck Fryman has dreamed of building a fleet of space freighters... and has no intention of letting pirates stop him. His success in dealing with pirates, though, brings him to the attention both of the Emperor, and of the man who's sworn to bring the Emperor down. Given the job of hunting down pirates, Fryman finds himself facing enemy fleets and even long-forgotten aliens. Staying alive is a challenge. Actually winning will take all of Fryman's skill... and some truly hare-brained schemes that nobody else would even try to pull off. Exciting space action by Kenneth E. Ingle