MPAA = Motion Picture Association of America.

(Films, in other words.)

RIAA = Recording Industry Association of America.

(Music.)

There's no equivalent that I know of for publishers.

These are all separate industries and organizations, not some kind of multi-headed hydra that acts and thinks in unison. So, in this context, your question makes no sense.

Referring to this:

"I've been saying it for a while: the publishing industry right now is where the music industry was ~3 years ago. The cycle is going to be exactly the same. At one point big music figured out that removing DRM let them sell more songs, and they finally dropped it. It looks like publishers are starting to realize the same thing. "

The realization that while DRM doesn't help them, being able to rapidly take down pirate files on the internet does?