This is a trio of stories set far in the future. The novels are A Thousand Words for Stranger, Ties of Power, and To Trade the Stars. They have it all, adventure, intrigue, romance, and lots of interesting aliens and planets.
I really like Czerneda. I highly recommend her Species Imperative and Web Shifters series as well. Just google 'em. You can't go wrong if you like science fiction. After all she's a scientist in addition to an accomplished author.