J.R. Tolkien is a master of world-building. The Lord of the Rings, without the extensive background information plotted and constructed by this genius of a man, becomes a random story no one would believe.
For another user, Red Rising‘s “Characters are so incredibly well-drawn and layered, in a fascinating universe, with amazing action and a character-driven story. There are five books, and you'll devour them all.”
U/ wehopethatyouchoke03 said, “Mystery against a backdrop of pre-apocalypse America that’s six months away from being hit dead-on by a massive asteroid that will likely kill nearly all life on the planet. So, so good.”