We all know that the cover is not the book but in order for anyone to open it up and take a look, without a cover one discovers that the thing may be overlooked. (Yes, we just watched Mary Poppins.)
Your book has to both fit in and be different. It must look like it belongs to the genre for which it was written so that it attracts the right audience. And it must stand out in a sea of tiny thumbnail images of other covers on an e-reader or on a table littered with other titles from the shelf.
After all your hard work writing it, you deserve to see your story finding its way into the online shopping cart or a reusable shopping bag. And Octobooky can help make that happen!