Although, there has been another species' visit on the horizon for some time, this is not the book Where They arrive. And I am not even sure if it would be a good idea. The interaction of humans and atevi quietly has enough of drama left, as Cherryh again Proves with this book.
If you like the series, this book will not disappoint you. It's not the strongest, but not so one of the weaker ones. I enjoyed it.