The book cover showcases a dark, underwater scene, with a mysterious, ancient stone portal standing at the ocean floor. Around the portal, strange glowing symbols pulse with a soft, eerie blue light. Above, swirling currents and shadowy sea creatures swim through the murky depths. A lone diver, their form silhouetted against the dark water, hovers near the portal, reaching out toward its glowing runes. The title, "Whispers of the Abyss", is displayed in sharp, metallic lettering at the bottom, with tendrils of glowing seaweed curling around the edges of the text, hinting at the unknown dangers lurking below.