To distribute your book, you will need your book cover image jpg (1000×640 minimum) and at least a MOBI, EPUB, or PDF file.
If you only have a Word Doc, we recommend a service called Draft2Digital.com to create your EPUB and/or MOBI file. Their free Word Doc converter is top-notch! Once you send your Word Doc through their converter, you can download the resulting EPUB, MOBI, and PDF files and then upload them to BookFunnel.
(We are not affiliated with Draft2Digital in any way, they just provide an awesome service.)
If you are not starting with a Word Doc, you can use Calibre to convert your book to the proper format. (Please note that a PDF is not a good source document for converting. The resulting EPUB and MOBI will likely have significant formatting problems)
While you can distribute your PDF without also providing an EPUB and/or MOBI file, your readers will love you forever if you offer them all three options. 60% of reader traffic downloads a book to their mobile device and their small screens make PDFs an unpleasant reading experience.