The City that Traveled the World is near-future science fiction about the colonization of the ocean.
The story focuses on an underwater luxury resort called New Holland that travels the international waters of the world and bills itself as a submerged sanctuary of sin that peddles sex, drugs, illegal medical procedures, and a host of other questionable goods and services to visitors.
http://www.amazon.com/dp/B00CSW27LS
The book is free today (Thursday, June 6th).