Emerald Sea

From the front flap of the Baen first edition: The battle against those determined to rule the world - or destroy it - continues. In the future the world was a paradise - and then, in a moment, it ended. The council what controlled the Net fell out and went to war, while people who had never known a moment of want or pain were left wondering how to survive. Duke Edmund Talbot has been assigned a simple mission: Go to the Southern Isles and make contact with the mer-folk - those who, before the worldwide collapse of technology, had altered their bodies in the shape of mythical sea-dwelling creatures. He must convince them to side with the Freedom Coalition in the battles against the fascist dictators of New Destiny. Just a simple diplomatic mission. That requires the service of a dragon-carrier and Lieutenant Herzer, the most blooded of the Blood Lords - because New Destiny has plans of its own.