"In 'The Unseen Darkness,' a gripping 600-page psycho-thriller, the relentless pursuit of truth and redemption leads protagonist Emily through the treacherous corridors of Hillcrest Asylum. Guided by a haunting melody, enigmatic voices, and a relentless determination, she confronts the heart of darkness hidden within the institution's walls. With sinister secrets, mind-altering experiments, and a malevolent connection that extends beyond the asylum's boundarie