Gentlemem, googling
WYSIWYG epub editor returns this!
sigil - A WYSIWYG ebook editor. - Google Project Hosting
as the first (or second) hit.
I believe that this implies to the vast majority that it's like a word-processor and the editing of an Epub can be done in [what sigil calls] book view, after all, what mainstream word-processor even has a code-view included? IMHO, this result in a google search is misleading to the vast majority and also what probably has mislead the OP.
