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.

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

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.

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,...