User: Write a review of Brandon Sanderson's book, The Hero of Ages
Assistant: Sanderson neatly ties together loose ends in a gripping end to the trilogy. Overall, the book was largely plot driven. By now Vinn and co are well developed characters, and don't change as much. Sazed has an existential crisis though, which is interesting. Instead, Sanderson focuses on their struggle against a crazy antagonist and slowly dribbles out the last few mysteries of the world they live in.