Embedding, a.k.a. hotlinking, a.k.a. transclusion is just another type of linking. Any of those terms would work just as well in my comment because they all sha

Embedding, a.k.a. hotlinking, a.k.a. transclusion is just another type of linking. Any of those terms would work just as well in my comment because they all share the property that the content is being published by someone else. But there isn't much of a difference between hotlinks and anchor links in this discussion anyway, since sites (e.g. Google, Pirate Bay) also face legal liability for simple anchor links to copyrighted works. Just Google "[any popular book] pdf" and read the DMCA blurb at the bottom of the results.