A square 1024x1024 AI image prompt for a professional audiobook cover, without any text or logos. The style should evoke a sense of nostalgic realism with a touch of melancholy and warmth. The central imagery features two figures in silhouette, seen from behind, walking away from the viewer on a cobblestone street bathed in the soft, golden light of late afternoon. One figure is slightly taller and broader-shouldered than the other, suggesting a companionship. The street is lined with elegant, slightly weathered buildings with ornate balconies, hinting at an old European city, perhaps Bucharest in the interwar period. The atmosphere is serene yet tinged with a quiet introspection. The color palette is dominated by warm ochres, deep sienna, muted golds, and soft browns, with hints of a dusky sky in the background. The composition should create a sense of depth and mystery, drawing the viewer into the scene. The overall mood is one of contemplation, memory, and the enduring nature of human connection.