First of all if you want to copyright your work go to the following link at the Library of Congress and download the copyright application. Since they are not set up to handle e-books, you and the bookstore employee will be wasting each other's time. You won't be able to sell the store a copy. If e-books ever begin selling in bookstores, I will change this information and let you know how to get ISBN numbers. You don't need an Internet website to sell e-books.
Internet websites involve alot of time and energy.
You need is a Web Hosting Service. Please stay away from free Web pages. The first page I had was free. It was promoted in major newspapers and by my spending money on news releases and advertising. I even received an award from a top Internet search engine.