Tipping Point: The Kenda Kahn Game (Beyond the Divide Book 1)

A chance meeting in a spaceport bar leads to a partnership between Captain Trisha Cadwalder of the Solarian League and Captain Conrad Gordon, whose origin and alliance are unknown. Trisha is an undercover covert operations specialist. Conrad is, well, Conrad, a man with secrets. Both operate freighters. They join forces to ensure the timely delivery of medication to a primitive planet in the throes of a deadly plague.
Tipping Point is the first novel in a three-book series. Taking place millennia from now, long after the demise of both the First Interstellar Empire and the Second Empire the various fledging star nations.