Popular author Sarra Cannon posted on her website that she is currently offering five of her ebooks
free.
If this sounds of interest to you, first navigate to
this webpage. You will see the selection. When you click on any one of the choices, you will get a webpage telling about the book. Near the very top of that page, you will be presented with links for several choices of vendors where you may obtain the book
free.
If you buy exclusively from Amazon, or any of the other of the vendors, I suppose that you can just go to the vendor's homepage and do a search for her ebooks that don't cost anything and get the same results.