Abyssal Covenant

A brilliant marine biologist, Dr. Lara Kass is a woman who trusts data, not people. Haunted by a past she keeps buried in the deep, she relentlessly pursues the ocean's secrets because they are the only truths that make sense. Her latest obsession: a thermal anomaly in the Mariana Trench, an impossible heat signature in the coldest place on Earth. Defying the warnings of her crew and the man she left behind, she makes the solo dive, driven by a lonely hunger for a discovery that will be hers alone.
But the abyss is waiting. When a catastrophic disaster strikes her vessel, she is pulled into a realm of breathtaking, impossible beauty and terrifying wonder. She is not alone. The source of the anomaly is an ancient, jaw-dropping being of immense power-a creature of fluid darkness and shimmering light, of sinuous limbs and hypnotic eyes. He is Thaloryn, and this is his sanctum. He has saved her life, but his price is a scandalous one.
He offers her a forbidden barter: her stories of the human world for the secrets of his. Trapped in his subterranean world, Lara finds herself in a daring game of intellect and desire. He is her specimen and she is his, but as she teaches him of love and loss, he awakens in her a savage, primal urge she never knew she possessed. The line between scientist and subject blurs, threatening to shatter everything she thought she knew about the universe, and herself. In the crushing darkness of the abyss, she has made the discovery of a lifetime.
But to claim this epic truth, will she have to sacrifice her humanity?