Fathom: The Fins Trilogy, Book 2 (Unabridged‪)‬

Since being blessed with becoming the ruler over all the merpeople, Morgan James has moved to New York with her fiance, Thayde, to begin her studies at the university. But her plans to resume a normal life are put on hold when overpowering thoughts start to take control of her and a terrible disease called the Shadow slowly begins to jeopardize Thayde's life. Faced with overwhelming odds, will Morgan, who has suddenly been thrust into being both the leader and protector of her species, collapse under her own insecurities or rise above the challenges that threaten her, producing consequences she never could have imagined?