With Mitchell First discussing who Achashverosh & Esther were historically, and the origins of Ta'anis Esther.
Most of the discussion is based on essays from his book, “Esther Unmaksed: Solving Eleven Mysteries of the Jewish Holidays and Liturgy”. A few of the other chapters of the book are referenced as well.
To purchase Esther Unmasked: https://www.amazon.com/Esther-Unmasked-Solving-Mysteries-Holidays/dp/0692375422/ref=sr_1_1?dchild=1&qid=1613865760&refinements=p_27%3AMitchell+First&s=books&sr=1-1-catcorr
Mr. First can be contacted at email@example.com