I was searching for prompts to try out Gemini 3 last night and found myself scrolling through X, looking for examples of what people were using to achieve specific styles. I realized it would be helpful to have a simple repository where anyone could easily search for prompts and share ones they found useful. So I created thepromptbook.ai. Simple, free, community-driven, no BS. I'll probably open source it at some point. I started building it at 7pm and had it deployed to production by 12am. Take a look! If you have any feedback or spot any bugs, just use the floating icon at the bottom right to let me know.