I have had a site with 'Yola' for a few years now and as a writer of non-fiction I have decided to purchase the 'Online Store' and use it on my site to sell my books but I have a problem: my books are over 20 MB and I want to know Q. How do I upload each book onto my site so that a client can add it to their 'cart' with out them being able to just click on it and download it or opening it to read without paying for it? And Q. How do I get paid for my products? I'm relatively new to all this, as is apparent!