Originally Posted by Toxaris
Since all ePUB3 readers can read ePUB2 there is no reason to 'upgrade'. All the changes with regards to supported CSS and HTML5 are in the specs on the IDPF site.
Please read those and look at the site of Liz Castro. She has some example ePUB's in ePUB3 format.
i am asking for the url that leads to liz castro's site