The conclusion of the Mistborn Trilogy, The Hero of Ages is an excellent book. As promised in the last book, the end of the world is in progress. Vin, Elend, and Kleiser’s crew struggle with Ruin. A new power, Hemalurgy, joins the mix and along the way we learn the secrets of the Koloss, Kandra, and Inquisitors.
What happens is too dependent and spoilery of the previous books, but the promised end of the world is in full swing. Spook’s development is handled well, bringing him into the spotlight– which he deserves as the book goes on.
If you’ve read the first two Mistborn books, this is a worthy conclusion.