There is no single ebook-friendly format. Different ebook readers are
better/worse with different formats (mobi, epub, etc). Therefore, we
probably need to be a little more explicit when talking about ebook
formats.

One of the advantages of some ebook formats, such as epub, is that they can
be more accessible for the blind and vision impaired than PDF or even HTML.
There are at least two packages I'm aware of which will allow epub
formatted books to also be read directly in Emacs.

My experience with Calibre is that the quality of the output you get
depends on both the quality of input (e.g. poorly structured or poorly
tagged PDFs will result in poor conversion) and on the settings of Calibre
itself (of which there is quite a lot). I'm not sure how well Emacs
documentation will convert. My experience with PDFs generated from Latex is
not good as Latex is very weak with respect to accessibility and generating
modern tagged PDF documents.

On Mon, 23 Dec 2019 at 09:01, Marcin Borkowski <mbork@mbork.pl> wrote:

>
> On 2019-12-22, at 22:38, arthur miller <arthur.miller@live.com> wrote:
>
> > Skickat från min Samsung Galaxy-smartphone.
> >
> >
> >> The ebook format allows you to consult the > manual with a smartphone,
> tablet or epub-> > reader.
> >
> > Both my smartphone and my tablet read Emacs manual perfectly fine in
> html format in browser, and I am sure if I wanted to read manuals in pdf
> format they would work perfectly fine too. What does epub brings that html
> or pdf does not? Personally I don't even like pdf.
>
> AFAIK, ebook readers can render HTML, but work much better with
> dediacted formats.
>
> FWIW, I converted the Emacs manuals to an ebook-reader-friendly format
> many years ago, and automatic conversion resulted in a very poor
> experience.  If someone volunteers to do a better job than Calibri, I'm
> all for it!!!
>
> Best,
>
> --
> Marcin Borkowski
> http://mbork.pl
>
>

-- 
regards,

Tim

--
Tim Cross