A cinematic, noir-inspired book cover illustration. The central focus is a vintage, ornate jeweled dagger lying on a dark, reflective mahogany desk. The blade of the dagger catches a sliver of sharp, dramatic moonlight coming from a window shutter. In the background, out of focus, the silhouette of a man in a trench coat and fedora stands near a rain-streaked window overlooking a blurry, neon-lit city street at night. Dark color palette featuring deep charcoal, navy blue, and blood-red accents. High contrast, sharp details on the dagger's gemstones, moody atmosphere, professional art style, grainy film texture, 1024x1024, no text, no letters, no words.