Here is my basic technique for converting text to epub:
- Open file in basic text editor (MultiEdit, Zeus, EditPlus, JEdit).
- Select all the text I want for the final epub file at one time into the clipboard.
- Create a new file in Sigil.
- Paste the text into 1 HTML file.
- Save.
- (You can now cut/paste more to the end.)
- Now add in the stylesheet if any. Save.
- Scroll through the first HTML file to find chapter breaks. Use the "Insert Chapter Break" menu item to create a second HTML file.
- Highlight the "Chapter NN" and use the combo-box to make it a heading for the table of contents.
- Repeat until all the chapters are defined.
- Save
I like Zeuse (I paid $25 for it) but a co-worker loves JEdit because it works on PC, Mac and Linux which we bounce between.
http://www.zeusedit.com/
http://www.jedit.org/
http://www.editplus.com/