Searched Miami's catalog and OhioLink and still can't find the book you want?
Request it through interlibrary loan.
Interlibrary loan will find a library that owns the book, and will request it on your behalf.
To request a book through interlibrary loan, fill out the online form: https://ill.lib.miamioh.edu/illiad
Library of Congress call numbers group books by topic. Below are some of the call number ranges that cover topics in religion.
Religion (general works)
Philosophy of Religion
History and principles of religions