How do I prepare for the UPSC Mains optional subject anthropology?

My background is in economics, therefore when I first started preparing for the UPSC, I was pretty perplexed about the optional. I also did not want to take the similar optional because of the extensive curriculum and difficult study required for it.
I then begin researching several fields, shortlisting sociology, and anthropology as the two sets of optional from which I will select one. After doing some quiet research and visualizing the entire syllabus of both topics, I made the decision to choose UPSC's main optional subject anthropology because it interests me more. Finding the books or resources for it was the other important issue that was in front of me, so I started looking for it.

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