help! need help w/ bookstore

where do i put ebook and find url for it?? then where do i put ad i wrote with
vendomatic? this seems to be a big secret online. an ebook needs to be written.
a second ebook needs to be written on using dropbox as a website.
what i'm trying to do is they see page with covers of books. click on cover, taken
to vendomatic ad. with buy button. thanks.