BIBLIOGRAPHIA IRANICA: The Cult of Mithras in Late Antiquity. Notice of a New Book: Walsh, David. 2018. The Cult of Mithras in Late Antiquity: Development, Decline and Demise ca. A.D. 270-430. Leiden: Brill. Follow the link for details.
A couple of other recent books on Mithras have been noted here, here, and here.
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