How it works
You get a browsable HTML archive designed to print well: readable type, sensible margins, images sized to the page, no navigation chrome on paper. Open index.html, print, and choose "Save as PDF".
Doing it through your own browser rather than a server means the PDF is generated on your machine, at whatever paper size and margins you prefer, and the file never leaves your device.
For an actual printed book
- 1Export the HTML archive with media included, so the images are local files rather than links.
- 2Print to PDF at A4 or Letter.
- 3Upload the PDF to any print-on-demand service.
Also fine as a document
If you would rather have something editable first, the Google Docs export gives you a .docx with real heading structure, which exports to PDF from Docs or Word.