The Well of Ascension by Brandon Sanderson
*Warning* If you haven't read Mistborn #1, please don't read this review. *Warning*
The Lord Ruler is dead, but now there's an empire to run. Kelsier can't run it since well he's dead, which means Vin has to step up to the plate. Most of the book focuses on the armies parked outside Luthadel.
Elend has to learn how to not only be a scholar, but also a leader. Unfortunately theory and reality are not close enough together. He is also somewhat of a pacifist and given to spending a lot of time debating rather than deciding which becomes somewhat of an issue. You really want Elend to figure it out though since he's such a loveable character.
This book is a bit slower than the previous one since the planning is part of the thrill in the first one, where this one is about finding out what to do. Vin's encounters with Zane are weird to say the least, and although there is a certain appeal to Zane, the downward spiral of madness is not as skillful as it might have been.
The second book is not quite as good as the first one although it is still pretty good.