PDF is very far from an ideal format for the today world of different-sized screens. It is a horrible experience on mobile and even worse on eInk pocket books.

PDF is very far from an ideal format for the today world of different-sized screens. It is a horrible experience on mobile and even worse on eInk pocket books. I would rather advocate making everything available in ePub. Or even better - FB2, it is an easy to grok/implement (designed with manual authoring, simple scripted processing and low-end devices in mind) single-xml structure decoupling the content from the view even more. I often convert ePubs to FB2 (with Pandoc and Calibre) to make PocketBook render them in its native fonts (which always are better) rather than in the font specified in the ePub. I would also mention that the text within PDFs often is not machine-readable (you copy-paste it and get text without spaces, with additional spaces or complete garbage) but I believe this is easily avoidable if you bake PDFs a proper way. I could also suggest publishing everything in Markdown (with images embedded in a Base64 section in the bottom) but this doesn't seem practical because browsers, book-reading apps and eInk devices don't support nice rendering of them directly. > “But how can I implement shiny whizz-bang features that will engage readers and drive conversions?!” You can’t. PDF is boring It's not. It supports JavaScript, embedded video and other kinds of active content. Sadly.