Don‘t read K.J. Parker if you want to feel great about the world. Read him if you‘re in the mood for lots of How Stuff Works packaged with black humour drenched in self-interested cynicism.
This particular book is all about a siege, and about the terrible things people do in the name of love. It‘s excellent. Awful, but excellent.
It‘s also the third book in a trilogy, so you maybe don‘t want to start here. Get DEVICES AND DESIRES instead.