imperialscum said:

To me it seems somehow hard to consider Zahn's trilogy and discard EBS and ROTJ.

I don't disregard (or discard) the second two films. I just don't own or watch them. Yes, Zahn's EU fits with those as well. However, they don't dwell on them. I'm perfectly fine with an occasional reference or name check.

There are even a few prequel references in a couple of his novels. Again, fine. They amount to little more than name checks. I don't give them a thought because they're throw-away.

His EU novels take place many years later and are separate stories. He succeeded in doing the very opposite of what Lucas did. He expanded the Star Wars universe.