A friend of mine found this site and sent me the link. I’ve not actually tried using this yet, but it seems like a handy tool for authors, so I thought I’d pass it along. What this button does for you is provide a sure way that readers of your site will be able to purchase your book from any retailer on any device they have (phone, tablet, computer, etc.). Watch the video for a better explanation. If you’re an active self-promoter, this might be a good widget for you to be aware of.