If you have done any affiliate marketing at all you have probably heard of ClickBank. Many people get started with affiliate marketing using ClickBank as their chosen affiliate merchant.
It is the largest digital information provider in the world. There are literally thousands of ebooks you can sell as a ClickBank affiliate.
It is free to join and is very fast to get set up with. You will be assigned one ID number that is inserted into any product URL you choose to promote.
These are laid out inconvenient to find categories. New products are added all the time so you will never run out of things to sell.
Because this is digital information once the product is developed there are no ongoing costs. Some affiliate merchants will pay you as high as 75% commission rate on the sale price.
You can even write your own ebooks and sell them on ClickBank. They handle everything for you including providing the affiliates for you to instantly start selling your ebook online.