Evaran Chronicles12 books in series
The Arrival Publisher's Summary
Jake Melkins is a few months away from turning 21. By the Seceltor Empire's laws, he will have to go to a breeding camp, or directly into slavery. Neither choice appeals to him. All this changes with the arrival of a space-and-time-traveling being known as Evaran at the space-station-turned-rest-stop that Jake lives on.
To make things complicated, Greecho, the slaver who abducted Jake as a kid, has arrived at the station. He and his crew, along with his 22-year-old human pet, Kathy, are about to go on a slave run to Earth.
Evaran has decided to interfere and free Jake and Kathy. That decision will lead him to Earth, where he will need to deal with the consequences.