I had a look at your Prince & Pauper ePub and it seems to offer the embedded font as an alternative addition to the main style sheets — with the alt.css being called from within the style.css (presumably when embedded fonts are supported) — is that right?
I'd love to use this approach in the ePubs I'm working on. Is it as simple as it looks? (main css, alternative css and embedded fonts in OEBPS; then referencing all these in the Manifest) — Or are there complexities I'm missing?
Many thanks for any advice you care to offer.