What is the author's style in Foundation's Edge by Isaac Asimov?

Isaac Asimov tells the story of Foundation's Edge in the third person, past tense, using a great deal of first person dialog to drive it along. As a narrator he assumes no personality but, like the "Second Foundationers" and "Gaians," can enter characters' thought processes. He describes at length how the Second Foundationers communicate rapidly and super-efficiently with the verbal component playing a minor role. Never does he attempt to display such communications. He loves convoluted mystery, however, and the belated revelation of useful facts.