Their (d2d) publishing software seems to be exclusive to them. I have not been able to find any similar any where on the net. All they require is a basic word document. No paragraph indents, page numbers, page layout etc. All that is necessary is chapter headings to be in bold about 3-4cm from the text. The software produces an epub, mobi, and PDF. The published book is epub, and they allow you to download an epub, mobi. and PDF free. You have a choice of four interior designs in the book and can sample each one before publishing.
Over a certain word count, f you choose to make your book a print book as well, the software uses the ebook cover and produces a print cover in about 30 secs. With the print book you get a free print ready PDF as well. I use the free downloads to upload to Smashwords and sometimes Amazon. There is more but I'm writing an Ebook here !!! bi