[soilwork]

Using ebook-convert.exe in command-line may be simpler than using GUI or opening CSS in epub file to modify it by hand. Since I almost never use calibre GUI, I am not sure whether or how this will affect the way GUI handles the database so please bear that in mind. Also, it may be useful only for those who are comfortable with command line.

I made a simple batch file named "2epub.bat" to convert files to epub with the setting I prefer.

REM 2epub.bat
ebook-convert %1 "%~n1%~x1.epub" --extra-css="C:\Program Files\calibre\fontin.css" --base-font-size 15 --no-default-epub-cover %2 %3 %4 %5 %6 %7 %8 %9

I put this batch file and the following "fontin.css" in Program Files\calibre directory. "fontin.css" is CSS file to support embedded fonts placed on PRS505. For more information, please refer to
https://www.mobileread.com/forums/showthread.php?t=36361

/* CSS for using Fontin fonts*/
/* Note that the Fontin fonts should be located in /fonts/ directory of Sony reader */
/* Modified: 2010 01 15 */
@font-face {
  font-family: "Fontin";
  font-weight: normal;
  font-style: normal;
  src: url(res:///Data/fonts/Fontin-Regular.ttf);
}
@font-face {
  font-family: "Fontin";
  font-weight: bold;
  font-style: normal;
  src: url(res:///Data/fonts/Fontin-Bold.ttf);
}
@font-face {
  font-family: "Fontin";
  font-weight: normal;
  font-style: italic;
  src: url(res:///Data/fonts/Fontin-Italic.ttf);
}

body {
  font-family: "Fontin", serif;
  line-height: 120%;
  widows: 0;
  orphans: 0;
}

Using these files, I can make "filename.ext.epub" from "filename.ext" without overwriting the original file.

2epub "filename.ext"

For example,
source file name -> output file name will look as follows.
--------------------------------------
filename.epub -> filename.epub.epub
filename.mobi -> filename.mobi.epub
filename.lrf -> filename.lrf.epub

This way, if the original source file is epub, the source file is not overwritten. Another reason is that I would like to track what is the source of the final epub file. For example, if I have multiple source files (e.g. freebies from Smashwords), I try converting from epub, mobi, lrf and leave the best one and it helps to know what is the best source file to use.