Rising Tide (SIRENS, Book 1)

"Debut novelist Zalecki takes The Da Vinci Code to sea in this near-future thriller with historical roots." -Publishers Weekly 

Forget whatever you think you know. History has been rewritten, and the future is in peril.
In a world where rising ocean levels swallow coastal cities and people scramble for resources on an overpopulated earth, the survival of the human race depends on biogenetic research to develop aquatic abilities. The year is 2098, and it has never been more dangerous for the elusive Sirens to be discovered.
Until now, the Sirens have remained hidden from the human world, inhabiting an obscure, undiscovered island in the Indian Ocean. Amid growing discontent among their youth, the Sirens, led by headstrong Mello Seaford, decide to test the waters of open society by striking a deal with the all-powerful megacorporation, DiviniGen Inc.
And they risk everything to do it.
Will the risk prove worth it, or will the Sirens be subjected to the diabolical whims of humanity?