Sanderson continues to impress with book two in The Reckoners series. He shifts location (a flooded Manhattan, where everyone lives on rooftops), brings in more creative superpowers in the Epics we encounter, and reveals a lot more about the Calamity and the origins of the Epics.
The ruler of the city can control water–both in vast volumes (like the tide, flooding the entire city) and with minute precision (forming it into tentacle-type weapons), and most importantly, literally every surface of water within her range she can see out of like a window if she directs her attention to it.
It’s up to David and the Reckoners to find out why she baited them into arriving to kill her. As usual, there is a lot more going on, and Sanderson’s plotting skills are in top form.