A dark and moody neo-noir book cover. A golden heart-shaped pendant lies on a rain-slicked asphalt street in a neon-lit Seoul alley at night. The reflection in a puddle shows the silhouette of a tactical SWAT officer. The atmosphere is tense, cinematic, with dramatic lighting from neon signs (pink and blue). Style of gritty cyberpunk, hyper-detailed, photorealistic, cinematic lighting, wide-angle shot.