I found myself in the mood to re-read this series (five volumes plus two books of shorter fiction). I don't think I have re-read the entire work since the final book, Harbors of the Sun, came out in 2017. I've just finished re-reading the third book.
The rough outline is that a young male being, a shapeshifter, finally finds his people after being on his own since childhood. He then has to fit himself into their culture and community, and then help them face a threat not only to their species but to dozens of other types of intelligent beings with whom they share their world.
There are spoilers here, y'all.
( Spoilers ahoy! )