Prompt code:
A vibrant and eye-catching book cover for a coloring book titled 'Geometric Animal Coloring Book for Adults: 50 Unique Designs to Color and Relax'. The cover features an intricate geometric animal illustration, like a stylized polygonal rat or another animal, with sharp lines and patterns. The background is a soft gradient of calming blues, purples, and greens. The title and subtitle are displayed in bold, easy-to-read fonts at the top and bottom.
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