If I'm reading the article correctly, though, iBooks is making content less consistent. If the author puts custom fonts on all their tags, iBooks is going to h

If I'm reading the article correctly, though, iBooks is making content less consistent. If the author puts custom fonts on all their tags, iBooks is going to honor all of them except <p>, <div>, and <span>. So you'll be reading along in Apple's serif typeface, then suddenly there will be a word an <em> tag rendered in sans-serif italics. As the article author said: "Ew."