To begin writing an EPUB file from scratch, do the following:
Select File > New (Ctrl+N) or press the New toolbar button.
Choose EPUB Book template. Click Create.
Choose the name and location of the file. Click Save.
A skeleton EPUB file is saved on disk and open in the Archive
Browser view.
Use the Archive Browser view specific actions to edit, add and
remove resources from the archive.
Use the Validate and Check for Completeness action to verify the
integrity of the EPUB archive.