Under normal circumstances, it would be horrible practice to add !important to all of your CSS rules, or for that matter, any CSS rules. !important in general is an easy way out for a culprit who is ...
I have an ebook here, which has some horrible markup (Robert Merle - Madrapour). The epub has an epub.css (where I automatically append some custom CSS), but also a "style='text-indext:20px' " on ...