There are multiple facets involved in answering this question correctly. Youll want to consult with a Digital Rights Management (DRM) service if you want your work fully protected. Here a few steps you can take to reduce the chances of your work being copied and redistributed. You want to start by registering your work with the copyright office s to deter casual book pirates. It doesn offer any protection against hacking copying or illegal redistribution but copyright ensures that you have asserted ownership of the work and can take legal action against perpetrators of piracy. Make you book only available in the cloud. Just like Netflix requires you to be online to view their programming you can do the same for your e-book. Since the source files are never downloaded to a device it makes nearly impossible to copy and redistribute. Employ industry-standard encryption. This method is used by most major publishers and sellers and offers the highest level of protection against unauthorized copying and distribution of your work. There is a trade-off in terms of customer convenience but you may find that a small price to pay in return for the security benefits offered. ordered-list Find the full rundown on how to restrict access to digital content here s . horizontal-rule EditionGuard italic s is an industry leader in e-book digital rights management solutions. By leveraging industry standard technologies like Adobe Content Server digital watermarking and controlled distribution EditionGuard allows e-book publishers and authors to secure their content from piracy at affordable rates. italic Click here italic s to sign up for a 3-day free trial and see how EditionGuard can protect your profits. italic