It was brilliant!
The book starts with ontological analysis of what is dirt, and investigates every concept that we use in our lives for which dirt could be used as a metaphor.
The connections that are made between cleanliness, tidyness, heterogenity, homogenity, public order, racism was remarkable.
Also it was really interesting that how dirt concept is one of the fundamentals of every human society but yet it was investigated very little philosophically
Then as the second part, it investigates the historical philosophical background.
It was a very structured and well designed book, with a simple language