TIME OF CONTEMPT: THE WITCHER 2 by Andrzej Sapkowski and David French

The kings and armies are manoeuvring for position, each fearing invasion from across the river, each fearing their neighbours more. Intrigue, dissent and rebellion fester on all sides.
After decades of oppression, the elves and other races are fighting each other and attacking the humans – and with growing numbers preparing for battle, the threat of all-out war looms ever greater.