Regarding regional flavors, this is a great contemporary book about coastal parts of India
https://www.amazon.com/Following-Fish-Travels-Around-Indian/dp/0857896008/ref=mp_s_a_1_8?qid=1682944055&refinements=p_27%3ASamanth+Subramanian&s=books&sr=1-8
( not pertaining to this topic but his book about the Sri Lankan civil war is very good - The Divided Island)