Do there exist cookbooks, possibly in English, about food from the state of Odisha, India -- preferably written by an author from that region?
I don't have any such cookbooks, but a google search turned up a lot of blogs with recipes. If you search, include Orissa and Oriya as well as Odisha.
I also found several English-language cookbooks through searching on Amazon.in (best search term was oriya cooking). Some of them are also available on their other sites. I have not seen or cooked from any of these cookbooks to give any personal recommendation.