Design a book cover set in a post-apocalyptic world dominated by alien beings wh

Design a book cover set in a post-apocalyptic world dominated by alien beings who resemble humans but have striking purple eyes. The aliens wear contact lenses to disguise themselves among the human population. The cover should depict a haunting urban landscape with crumbling buildings and a dark, ominous sky. In the foreground, show a close-up of a figure whose purple eyes are faintly visible beneath the lenses, hinting at their true identity. The atmosphere should be tense and mysterious, evoking the feeling of an ongoing, hidden threat.