We've recently created a Handbook, called "ebookery 101: a Handbook," for use by our new customers. You can download it below, where you see the blue link (beneath the image of the cover) that says "BooknookBiz Handbook.pdf." Please note: this is not a "how to make your own ebook" handbook.
The Handbook comes in PDF format, and is easy to download and use. It's not a "how-to" guide so much as a guide to what ebooks are; what they look like; what they can and can't do, and what you can expect your book to look like, and how it will function. The Handbook is not meant to be read, front-to-back, like a novel, but is intended as more of a reference book. Each section (Roman Numerals) speaks to a different aspect of ebooks and self-publishing. If you click the "Bookmarks" icon on your PDF reader, it will open and display a fully-interactive, tree-style Table of Contents on the left-hand side, which will give you ease of navigation, and is fully searchable. You can download the Handbook from the Dropbox by clicking the blue filename, beneath the cover image, at the bottom of the article.
Please be patient when you download it--it's a 5.5MB file, with a lot of helpful images and screenshots. Thanks! We hope you find it useful, no matter what company you choose to do your conversion.