One thing that publishers have to start understand is that the tighter control they try to put on the ebook industry by
1. Controlling the release of the books as ebooks
2. Controllling the price of ebooks
3. Controlling the ebooks access through DRM
would give users enough motive for pirating these contents. Several experiments in the music and Movie has clearly shown that together control on the distribution of these media content lead to an increased activity on P2P sites. Read this paper on SSRN
Publishers should work with Authors and Retailers to come up with a economical model that would duly compensate everyone without restricting the end users much.