A professional audiobook cover art, square 1024x1024, evoking the dark, gritty atmosphere of Victorian London. The central image is a lone, slightly tattered, hooded cloak disappearing into a shadowy, cobblestone alleyway. Hints of gaslight illuminate parts of the wet cobblestones and damp brick walls, creating deep shadows. A subtle, almost ethereal glow emanates from behind the cloak, suggesting innocence or hope. The color palette is dominated by deep blues, grays, and browns, with touches of muted ochre from the gaslight. The overall mood is somber, mysterious, and slightly melancholic, with a sense of urban decay and the struggle for survival. Composition is focused on the vanishing figure, drawing the viewer into the mystery.