Adobe provides the backend infrastructure for this and every other service except for Amazon. And yes, they have DRM but its trivial to circumvent with the prop

Adobe provides the backend infrastructure for this and every other service except for Amazon. And yes, they have DRM but its trivial to circumvent with the proper tools. But consider the independent book stores that might stay open a little longer if you suggest they get with the program. I mention this because a longtime friend of mine opened her store 5 years ago and now that occasional Harry Potter release is not something she can rely on, she found Google's reseller program super easy to set up, maintain, and integrate with her main & mobile web sites. Look up St Johns Bookseller if you're curious.