Complex sentence: Although Dick Hallorann plays a minor role in this novel, by saving Mike Hanlon's father and many others at the fire at the Black Spot, he plays a more significant role in the novel "The Shining".
Split into simpler sentences: Although Dick Hallorann plays a minor role in this novel, by saving Mike Hanlon's father and many others at the fire at the Black Spot. He plays a more significant role in the novel "The Shining".