Although I was rather hoping that this was the final book in a trilogy, it turns out it's the penultimate book in a quartet, and the only thing about this fact that displeases me is that I have to wait a while longer for the conclusion of the adventures of Wax and Wayne. 
 I have to say, that in among all the action and humor that the series is known for, I found some great moments packing an emotional punch, and in a real sense THOSE felt like part of a concluding volume, as characters have revelations and resolutions that seem to round out their arc in important ways. Sanderson really has his work cut out for him to top this in the concluding volume.