"Lira, a famous siren, must prove herself by stealing the heart of the man, a prince, threatening their race"--

When Neptune tells Emily and her merman father and human mother to return to Brightport to try to make merpeople and humans work more closely together, Emily faces problems with old enemies, her new, half-merfolk friend Aaron, and a mystery related to a group of legendary lost sirens.

Gemma must battle Penn to break the siren curse and secure a future with Alex.

When Gemma runs off with a dangerous clique of powerful girls, Harper teams up with Daniel and faces unprecedented dangers to rescue her sister, who develops increasingly formidable magical abilities.

In the quiet seaside town of Capri, sixteen-year-old Gemma enjoys a close bond with her sister Harper and a growing attraction to next-door neighbor with Alex, but everything changes when, after partying with newcomers Penn, Lexi, and Thea, Gemma discovers she has powers that will force a terrible choice.

Victoria risks everything to leave a dangerous marriage and gain a second chance at life. But when her escape goes awry, she finds herself caught in the strong embrace of a mysterious siren, forced to choose: temporary salvation or immediate death. And so, a cursed deal is struck. Five years later, Victoria is alive -- and the world's finest ship captain. But her debt to the siren looms while her conniving ex has demanded a king's ransom as the final...