The ebook is in pdf but I am not sure what security settings I should apply to protect it. I am not sure about the number of pages clickbank usually need. I am thinking 15 pages might be too short. I have rented someone on vworker to make the website. Are there any special requirements apart from those clickbank has indicated in their guidelines?
i think, you should download some quality based ebook to see what they did and you do so. you can use this link: http://pdfgoo.com/ is a pdf search engine website to search any pdf files