> Without a DRM mechanism it can be easily shared on warez sites. Every time a publisher mentions this to me, they look surprised when I tell them their books

> Without a DRM mechanism it can be easily shared on warez sites. Every time a publisher mentions this to me, they look surprised when I tell them their books are already easily shared on warez sites. Complex DRM schemes, especially Adobe, limit innovation in reading applications and cause all sorts of end user issues. This in turns pushes people to find sites like zlib in the first place.