The Descent meets The Ritual in a cult aquatic horror about a group of academics trapped in a sea cave who must reckon with eldritch horrors as they are forced to atone for their greatest sins. ATONE OR DIE. Grad student Caro has no idea what she wants to do with her life, but when an opportunity arises to act as a research assistant on an anthropological expedition for her professor and lover, Edward Beck, she doesn't hesitate. Beck assembles a team of academics and professionals to study the ancient sea-based Cult of the Leviathan, and the expedition descends into the sea caves where the cult are said to have dwelt. But when the cave entrance collapses, trapping them inside, the expedition will find they are not alone in the darkness. Surrounded by strange artefacts and scattered bones, an ancient trial has been set in motion. One by one, the members of the expedition will be tested and forced to atone for their greatest sin. . . or die.

New York Times bestselling author Mira Grant, author of the renowned Newsflesh series, returns with a novel that takes us to a new world of ancient mysteries and mythological dangers come to life. Seven years ago, the Atargatis set off on a voyage to the Mariana Trench to film a "mockumentary" bringing to life ancient sea creatures of legend. It was lost at sea with all hands. Some have called it a hoax; others have called it a maritime tragedy. Now, a new crew has been assembled. But this time they're not out to entertain. Some seek to validate their life's work. Some seek the greatest hunt of all. Some seek the truth. But for the ambitious young scientist Victoria Stewart this is a voyage to uncover the fate of the sister she lost. Whatever the truth may be, it will only be found below the waves. But the secrets of the deep come with a price.

New York Times bestselling author Mira Grant, author of the renowned Newsflesh series, returns with a novel that takes us to a new world of ancient mysteries and mythological dangers come to life. Seven years ago, the Atargatis set off on a voyage to the Mariana Trench to film a "mockumentary" bringing to life ancient sea creatures of legend. It was lost at sea with all hands. Some have called it a hoax; others have called it a maritime tragedy. Now, a new crew has been assembled. But this time they're not out to entertain. Some seek to validate their life's work. Some seek the greatest hunt of all. Some seek the truth. But for the ambitious young scientist Victoria Stewart this is a voyage to uncover the fate of the sister she lost. Whatever the truth may be, it will only be found below the waves. But the secrets of the deep come with a price.

From the award-winning author of The Twisted Ones comes a gripping and atmospheric retelling of Edgar Allan Poe's classic "The Fall of the House of Usher." When Alex Easton, a retired soldier, receives word that their childhood friend Madeline Usher is dying, they race to the ancestral home of the Ushers in the remote countryside of Ruravia. What they find there is a nightmare of fungal growths and possessed wildlife, surrounding a dark, pulsing lake. Madeline sleepwalks and speaks in strange voices at night, and her brother Roderick is consumed with a mysterious malady of the nerves. Aided by a redoubtable British mycologist and a baffled American doctor, Alex must unravel the secret of the House of Usher before it consumes them all.