Oasis 4 by Dale Chamberlain

https://www.amazon.com/Oasis-4-Dale-Chamberlain/dp/196122545X

Dalechamberlainbooks.com

Oasis 4 is a space station located at a galactic crossroads in deep space, and it's the property of Stellar Logistics and Freight Corporation.

Phil Ross is the manager of that station. The purpose of the station is to provide a place for commerce and trade to take place. Being situated where it is, the station is also often dragged into unfortunate situations and often becomes the location for less-than-legitimate activity.

Phil Ross and his staff find themselves constantly dealing with situations that often have huge implications for a great many worlds.

Phil and his staff go by a simple guiding principle to get them through situations, and that is to do the decent thing, whatever the challenge may be.

The result is a multiworld criminal syndicate has been put back on its heels, and the slave trade was dealt blows that they may not recover from.