Why did Disney Animation Studios make us wait six years between "Frozen" and "Frozen II?" Well, first, it wanted to make sure the original warranted a sequel with a story worth telling.

and I remember feeling that we were doing something that was going to pack a serious punch," Gad recalls in the new book. After Gad, Kristen Bell, Idina Menzel, and the rest of the Frozen 2 cast ...