I've found myself in love with the great book recommendations on this Wiki, but can't find one specifically on this man. Anyone have a recommendation they can point me to? Thanks a ton.
I know this post is pretty old but my recomendation may still be of help to you.
M. Rahim, Cyrus the Great: Life and Lore, Massachusetts 2018
It gives a great overview regarding the different sources without limiting itself to only one.
If you want a more specific book recomendation you can just dm me.