Version for e-book readers
PDF format on e-book readers is unpleasant (it cannot scale, you read every page like a image: zoom in - scroll - zoom out - next page). So it will be great to have a book in e-book reader freindly version, for example in EPUB.
Even the one-page HTML could be fine (with help of external apps like: calibre).
This is a general Pillar issue. In fact there should already be some code for EPUB support, and help on maintaining it would be very welcome.
Thanks for answer. As I understand, the Pillar EPUB exporter is in quite early stage, and it will be easier to create one-page HTML. Am I right?
Yes. In that case, the way to go would be to upgrade the book to the more recent build system used in the booklets, and then do make htmlbook. We're still cleaning the architecture of Pillar however, so that will again change soonish.
A quick and dirty alternative would be to simply merge the per-chapter HTML files together. If you just want to read the book now, that might be the simplest one…