Yes that did the trick, together with --remove-paragraph-spacing-indent-size
And I noted, you can also specify some css, so you maybe could kill the space between <p></p> too, but above works also so I am happy now!
Originally Posted by ldolse
You can try adding the --remove-paragraph-spacing option. Alternatively edit the doc in Sigil or using the Tweak epub in Calibre to adjust the top and bottom margins in the css to what you like.