We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.
Embed sales widget?
I know I can get "buy now" buttons to place on my site via the "Promote" link on the "My Projects" page. I also see a variety of sharing buttons on the product page for a specific book. One of these buttons is "Embed" but it doesn't seem to do anything (tried on Chrome and Microsoft Edge, on Windows 10). Is this intended to be a way of placing an iframe or other wdiget on my site? I'd sure like it if that were possible!
Closest thing I see right now is to go ahead and use the Facebook button to share there, which apparently creates an image of the cover with some call-to-action text and a link back to the page on Lulu. It's better than nothing, also better than a plain "buy now" button...