The Trouble with Peace - Joe Abercrombie (Book 2 in The Age of Madness)

Unrest worms into every layer of society. The Breakers lurk in the shadows, plotting to free the common man from his shackles, while yesterday's heroes nurse grievances and noblemen bicker for their own advantage. The King of the Union struggles to find a safe path through the maze of knives that is politics, only to see his enemies, and his debts, multiply.

The old ways are being swept aside, but those who would seize the reins of power will find no alliance, no friendship, and no peace, lasts forever.