Leviathan Wakes (Expanse #1)

A freighter discovers the first and finds itself being hunted for its information.
A cop is asked to find a rich kid whose turned her back on an influential family.
As the threads start coming together, they try to stop a war in their own ways.
This was a really good story, each chapter flicking between the two main characters. Holden is slightly naive, thinking that making everything public will mean everyone has all the information to make informed decisions. Miller is a slightly weary cop, more realistic, and not afraid to keep quiet until he has all the facts.
The other characters are well written, and it's tense right up until the end.