This book was a pleasure to listen to beside my wife; exciting, hilarious, with enough substance to keep it interesting. It is fully a worthy follow-up to the excellent Steelheart, and takes the story in new directions as it changes from Steelheart's battle-of-the-underdogs to a story about fear, courage, redemption, and corruption, with just a bit more substance than you would expect from an action-flick. As always, we love coming back to Brandon Sanderson because of his reliable clean-ness (avoiding sex, profanity, or gratuitously graphic descriptions) and his good sense of principle. His world-building is also quite good, this time leaving Newcago's steel darkness for Babylar's drowned skyscrapers and glowing neon paint. The side-characters are certainly less-well developed than those of Steelheart, and the relationships between characters are utilized less than in Steelheart; but greater development and engagement with the concepts of the world, and close interaction with a variety of the major villains, are things that were add to Steelheart. Overall an excellent experience (and the reader for the Audio, Macleod Andrews, is absolutely excellent.