Prompt code:
A 2D flat book cover design with the title "From Half Radio Station to Internet of Everything" in a sleek, modern font. The design features an abstract spiral motif with deep copper tones transitioning to electric blue. The spiral starts with thick, bold lines and gradually becomes thinner and more intricate towards the outer edges. Subtle silhouettes of communication devices from different eras, including an old radio, telephone, computer, smartphone, and futuristic IoT symbols, are overlaid on the spiral. The background is minimalist with faint circuit board patterns. The design maintains a clean, high-tech feel throughout.
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