Reverend Insanity : Master of Gu | 
As I read through the book, there have been many times were the author used specific language to convey the a background. An example is when I was in a chapter it was talking about a scene were the protagonist was running away from a villain, in a swamp.
pickThis novel is amazing and a must read for those who love evil/ruthless main characters.The world building is great and is done at a pace that does not overwhelm while it let us waiting for more. In this aspect the tales of Ren Zu plays a great part, said tales are relatable even to modern day to day (while in some cases may be seen as the diary of a psychopath, forsaking love and lying to achieve his own goals).
