How could they not include Asimov's "Foundation" series? It was what started the modern era of sci-fi and is arguably the most influential sci-fi novel of all time; and yes, I do mean even more than "Dune." If you read both closely, you'll see that Herbert took a lot from Asimov and put it in a less challenging context, which is why it tends to be more popular in general.

"The result is that Herbert's magnum opus now comes across more like an epic historical novel that happens to be set in the future, not the past."

-that's the exact premise of Foundation which appeared two decades earlier, only the storyline in Asimov is much more complex and dialectical.