Crimen Negro Rojo Gris Naranja Azul Oscuro Suspense Thriller Tension Intriga Curiosidad Misterio Incertidumbre Peligro Book Cover Ideas with Sombras Niebla Oscuridad Textura Luces Callejón Silueta Huellas Dactilares Papel Distintivo Policial Efectos De Luz Desgaste Bordes Figura De Detective

A darkened alleyway stretches into the background, shrouded in dense shadow and swirling fog. The faint glow of a streetlight illuminates a broken, cracked pavement beneath it, revealing scattered papers and a distinct, oversized blurred police badge half-obscured in the lower right corner. A lone silhouette of a trench-coated detective figure stands mid-center, moving away from the viewer further into the alley, with the hint of tension and danger conveyed by splashes of red and orange highlights glimmering off the fog and damp surfaces. A faint fingerprint pattern overlays parts of the cover in the background, partially concealed like hidden clues. The edges of the cover feature a worn, distressed texture, giving a vintage, mysterious feel.

The title, *"El Último Rastro,"* is positioned boldly at the top in a sans-serif, condensed uppercase font with sharp, modern edges. A subtle orange glow surrounds the title, creating prominence against the moody dark background. The subtitle, *"En cada sombra se esconde una verdad, y en cada verdad, una mentira,"* is in a thin, serif italic font, adding elegance and a hint of unease. The author's name, *"Ricardo Vila Romero,"* is placed at the bottom in a clean, sans-serif font, smaller but legible, with a subdued red accent for emphasis.

The dark alleyway dominates the vertical frame, with the detective silhouette centrally placed and proportioned. Text aligns symmetrically—title at the top, subtitle beneath the title, and the author's name at the bottom. Supporting design elements (fingerprint, badge, scattered papers) are subtly placed to the sides to not distract but enhance the atmosphere. Highlights of red and orange punctuate corners and edges to balance the composition.