Alosa is the daughter of the Siren Queen, and her mission is finally complete. Not only has she recovered all three pieces of the map to a legendary hidden treasure, but the pirates who originally took her captive are now prisoners on her ship. Still unfairly attractive and unexpectedly loyal, first mate Riden is a constant distraction, but now he's under her orders. Now Alosa and her crew are in a deadly race with Vordan, the pirate king, to find...

Eleven-year-old Marcus is spending a week at the beach with his mother in a tiny old travel trailer, but boredom turns to terror when a new friend discovers a cellar that has magical doors through which people keep disappearing.

In a society determined to keep her under lock and key, Tavia must hide her siren powers. Meanwhile, Effie is fighting her own family struggles, pitted against literal demons from her past. Together, these best friends must navigate through the perils of high school's junior year. But, everything changes in the aftermath of a siren murder trial that rocks the nation, and Tavia accidentally lets out her magical voice at the worst possible moment. Soon,...

Vowing to get her sister Gemma back from the siren sisters no matter what the cost, Harper must face dangers unlike any she's ever experienced. Fortunately, she has Daniel by her side, a gorgeous guy who's devoted to helping her find her sister--and who's immune to the girls' dark powers.

When seventeen-year-old friends Liv and Will are accepted in a semester-at-sea program, they are excited to spend six weeks aboard the luxury cruise ship The Eos, but after Will disappears the first night, Liv grows suspicious that something sinister is lurking below deck.

Elena is excited to visit her cousin Cristóbal. But she gets a lot more than she bargained for when she meets mysterious underwater creatures called Sirenas--and encounters the evil sorceress Shuriki once again.

With Penn and Lexi determined to kill Gemma and replace her with another siren, Gemma, aided by Harper and Daniel, must delve into her enemies' mythical past and darkest secrets in a last-ditch effort to protect all that she holds dear.

After her sister's sudden death, seventeen-year-old Vanessa investigates a series of inexplicable drownings off the coast of Winter Harbor, Maine, and uncovers an unimaginable secret that changes everything.

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.