What tools create such a azw3? (And tips to convert it to epub...)

[patrik]

There is a small group of people that are writing books (superb, for a very tiny niche, I buy all books they put out).

But... they all do not convert very well to epub. No functioning toc is the main problem, but also that some text is being put into <h1> instead of <p> which makes it strange to read. So far, I have manually changed every title and cleanup some things (in Sigil). Works, but i would like to understand why these azw3-books are different from (most) others I buy from Amazon. Also, if appropriate and easily done for them, I may contact them and ask if they can change the creation process (I have some contact with some of them for content discussions).

Every <p> containts info of margins and widows/orphans.

<p style="margin:0.00% 0.00%; text-align:justify; widows:0; orphans:0"><span style="font-size:1.8rem; font-weight:bold">&nbsp;</span></p>


<h1 style="margin:0.00% 0.00%; text-align:justify; page-break-inside:avoid; page-break-after:avoid"><a name="_Toc320107674"><span style=" font-size:1.8rem; font-weight:bold">&nbsp;</span></a></h1>

The css:
@page Section1 { size:432pt 648pt; margin:72pt 72pt 72pt 0pt }
div.Section1 { page:Section1 }


<meta content="Amazon.com" name="generator" />

This is what chapter titles look like:
<p style="margin:0.00% 0.00%; text-align:justify"><a id="C13"><span style=" font-size:1.8rem; font-weight:bold">Chapter 1: xx</span></a></p>


My guess is that they are using Microsoft Word writing the books, and converting by amazon, but that's just my guess. I think they are using a pdf, or whatever the source for physical print is, and using that as the source for the ebook.

What I do is go through and manually edit every change titles, and add info of titles in the css, and clean up some stuff that are in <h#> for some reason.

Tips?