There aren't many features that can protect you nowadays from image theft. And there is no way to prevent it completely. Even if a platform has the ability for you to disable 'right clicking' on images, users can still either take a screenshot or view the source code to grab the image. This is one of the reasons why Flash sites were so popular in the early to mid 2000's. With mobile traffic leading the way these days, creatives need to move to responsive HMTL5 sites.
liveBooks does not currently offer the ability to disable right clicking but we could have a developer add a unique code to your site should you really want this.