Dark Realistic Book Cover Prompt

I’m looking for a well-crafted text prompt I can drop straight into Midjourney (or a similar AI art tool) to generate the front cover of my new mystery-suspense novel. The scene must be set inside a forgotten, shadow-filled library whose towering shelves fade into darkness... (Budget: $25 - $50 USD, Jobs: AI Content Creation, AI Design, Book Cover Design, Graphic Design, Visual Design)