A dark, atmospheric, square 1024x1024 AI-generated image for a professional audiobook cover. The style should evoke classic film noir and gothic mystery. Dominant imagery includes a silhouetted figure of a mysterious individual standing in a fog-shrouded Victorian London street. Cobblestone streets glisten under faint gaslight. Shadowy, ornate Victorian architecture looms in the background. Subtle symbolism could include a single, flickering gas lamp casting long, distorted shadows, and perhaps the faint outline of a crow perched on a distant rooftop. The color palette should be dominated by deep blues, grays, and blacks, with accents of muted gold or amber from the gaslight. The mood should be unsettling, suspenseful, and alluring. The composition should be tightly framed, focusing on the atmosphere and the enigmatic presence, creating a sense of foreboding. The overall aesthetic should be sophisticated and professional, suitable for a thriller audiobook. No text, no letters, no words, no title, no author name.