From Twitter via top_book:
Spotbit: Paperless Publishing Free
This is an odd beast. All the free ebooks are downloadable .exe files (which I guess = PC only). If I understand this correctly, it turns a PDF into a computer program and the PDF file becomes a page-flipping eBook. There's a big variety of free eBooks there. Yet I wonder if all of them are legal.
For instance, is this one legal?