Creepy unknown

Previously

…It pulsed once, twice, then vanished. Elara shivered, a cold dread settling deep in her bones. It felt like eyes, watching her from the darkness, eyes that held an unsettling, predatory intelligence. She didn’t mention it to Father Michael, not wanting to add to his burdens, but the image was seared into her mind. The book was a key, yes, but it was also a beacon, and something in the darkness had just taken notice. The night outside the study window no longer felt empty, but full of unseen watchers, their gazes drawn to the secrets Father Michael had tried so desperately to keep buried. The adventure, she realized with a sickening lurch, had only just begun.