About The Lullaby: A Dark Psychological Thriller of Digital Control
The app was supposed to help you sleep. Instead, it kills.
When linguist Dr. Aria Nikoula discovers hidden patterns buried in the audio tracks of the world’s most popular sleep app, Lull, she realizes the lullabies aren’t harmless—they’re weapons. The voice behind them, known only as The Caretaker, turns language into a tool of obedience, silence, and death.
Drawn into the mystery is Kassian Roe, a disgraced podcaster desperate for redemption. Together with a cynical detective and a young hacker, they uncover a conspiracy that stretches far beyond the app—into a cult of hypnotized listeners, and a company willing to sacrifice millions to protect its secret.
As whispers spread across the globe, Aria and Kassian must race to stop an echo that no one can contain. Because once the Caretaker’s song enters your head, there may be no way out.
Perfect for fans of Alex Michaelides, Blake Crouch, and Josh Malerman, The Lullaby is a dark, cinematic techno-thriller about language, influence, and the terrifying power of silence.
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Author Bio:
Stefanos Gkagkastathis is a master of unraveling the mysteries hidden in plain sight. With a passion for exploring the unseen and challenging the conventional, Gkagkastathis invites readers into worlds where the boundaries between truth and fiction blur. His debut novel, The Edge of Belief, pulls back the curtain on conspiracy and perception, making readers question what they know and what they believe.
Stefanos’s stories are inspired by a deep fascination with the unknown—the secret histories, the forgotten truths, and the narratives that live just beyond the surface of everyday life. Combining vivid storytelling with complex characters and high-stakes plots, his writing leaves readers with a lingering sense of wonder and a thirst for more.
When he’s not writing, Stefanos is either diving into obscure books, exploring thought-provoking documentaries, or analyzing the stories behind the stories. Writing under a pseudonym allows Stefanos to embrace a creative freedom that fuels his pursuit of bold, often controversial ideas.
Connect with Stefanos Gkagkastathis as he continues to explore the edges of human belief, one thrilling narrative at a time
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