Quizmaster Wayne Mills said an "electric" atmosphere was hushed during an intense sudden-death play-off.
"Reading helps kids develop empathy and emotional intelligence, which is well documented as an indicator of successful relationships and success in the workplace," he said.
"Kids identify with characters as role models of behaviour, and the well-developed characters in books discourage stereotyping. So just by opening up a book there are worlds to explore. It's absolutely no fluke that books are shaped like doors for that very reason."
New Zealand teams also have an impressive record on the world stage, winning five of the 16 international Kids' Lit Quiz finals.