You can add a Buy Now Button to your website to accept payment for your product or book
PayPal is a popular choice for online payments and it is safe and secure to use.
Set up your account and log in to PayPal.
Choose Merchant Services Tab
Click on Create Buy Now Button
The rest is very straight forward . just follow the instructions
Click yes to encrypt your button as you do not want peepers to see your download page or other information.
Use default settings for Shipping and tax options.
Click the More Options button
Under the heading Customize Your Buyers Experience insert the url for the page that contains the download of your product or book.
Use the default settings for next section except for tick no shipping address (unless you plan on sending out a physical book then you would need their address but for a digital download an address is not needed.)
Click Create Button Now
You will be given some html code which you need to copy and then paste in your website where you want your Buy Now Button to go.
Click Done and your payment button is ready to use.