DrewThomasson/ebook2audiobook ? reverse-engineered prompt

I want to build an app that turns my ebooks into audiobooks. It should have a simple web interface where I can just upload an ebook file, like an ePub or a PDF.

The most important feature is the voice. I want to be able to choose from a few different high-quality, natural-sounding narrator voices. It would be amazing if I could also upload a short audio clip of my own voice, or someone else's, and have the app clone that voice for the narration. The tool should also be able to handle books in lots of different languages, not just English.

Once I hit "go," it should process the book and give me back a standard audio file, like an M4B or MP3, that I can listen to on my phone. Please make sure that if the ebook has chapters, the final audiobook preserves that structure. Use modern Python libraries to make this happen.