Which is the best material for anthropology optional for UPSC?

The syllabus for anthropology is enormous yet not very in-depth, making it a distinctive topic. It’s not necessary to research endlessly and become a leading expert on every subject, as is required in certain humanities courses.
When I started looking into this using the internet, I discovered that there were many resources available, and I realized that it would be quite challenging for me to look into everything, so I started asking some of my known people in this field for advice on the best preparation route.

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