In this series the world of humans is served by the Crasii, animal slaves that walk and talk like humans. The world was run by the Tide Lords who are immortal but disappeared from human affairs. The Tide (forces of magic) is coming in though and the Tide Lords are beginning to appear, and they want to return to the way things were before which is spooking the humans. And then there is the Immortal Prince who just wants to die.
The series is full of political machinations, action and good dialogue, and is well worth getting in to especially those who like a little political intrigue with their fantasy fiction.