Link Master --> Ipad ebook format

http://mcloide.wordpress.com/2010/07/29/converting-your-pdf-to-a-valid-epub-file/

http://threepress.org/document/epub-validate/

http://calibre-ebook.com/download_windows

http://en.wikipedia.org/wiki/Comparison_of_e-book_formats

 http://www.pdftoepub.com/product.asp

http://www.nookboards.com/forum/index.php?topic=121.0

http://code.google.com/p/sigil/downloads/detail?name=Sigil-0.4.0RC1-Windows-Setup.exe&can=2&q=