Into the Drowning Deep

Into the Drowning Deep by Mira Grant delivers a chilling fusion of hard science fiction and marine horror. When the research vessel Atargatis disappears off the Mariana Trench during a mockumentary shoot exploring mermaid myths, public interest fades... until a new expedition aboard the Melusine aims to uncover the truth. Leading the mission is sonar specialist Tory Stewart, who seeks answers after her sister’s unexplained disappearance.

The diverse crew includes marine biologists, linguists, and journalists—including Olivia Sanderson and the Wilson sisters—each with their own motivations and secrets. Tension rises as the sunken depths reveal horrifying evidence: real, violent mermaids. As the species hunts the ship, survivors learn that these creatures are not female sirens but rather male predators, while the true threat is a colossal female behemoth stalking the deep

The narrative weaves claustrophobic terror, rigorous speculation on mermaid anatomy, and ethical dilemmas about experiment and exploitation. When communication with a captive mermaid becomes possible, hope arises—but chaos follows. Survival hinges on knowledge, adaptability, and alliances formed under pressure.

With relentless suspense, credible marine science, and a richly diverse cast, Into the Drowning Deep immerses readers in an oceanic nightmare. Expect vivid underwater horror, sharp characterization, and the perfect atmosphere for fans of creature-feature terror rooted in believable science.