For a deeper dive into your topic, try a monograph. Monographs are single-volume books providing in-depth research into a single subject . They are usually written by one author, who is an expert or scholar in the field, and published by an academic or university press.
Queering Creole Spiritual Traditions by 
Trans Talmud by 
When a Human Gives Birth to a Raven : rabbis and the reproduction of species by 
Sexual Ethics and Islam by 
The Shape of Sex by 
Reforming Sodom : Protestants and the rise of gay rights by 
Given to the Goddess : South Indian devadasis and the sexuality of religion by 
Black, Quare, and Then to Where : theories of justice and Black sexual ethics by Collins Library, like most academic libraries in the United States, uses Library of Congress Subject Headings to describe the content of books. In many ways, subject headings are a form of tagging, in that they represent the content of the material and provide ways for you to efficiently locate more materials that are conceptually related. See QueerLCSH for a comprehensive list of Library of Congress subject headings. Keep in mind other databases may use different subject terms.
Here are some examples related to this course:
Homosexuality -- Religious aspects
Gender nonconformity -- Religious aspects
Masculinity -- Religious aspects
Gay people -- Religious life
Add a religious tradition or location to further specify your results, for example:
Homosexuality -- Religious aspects -- Islam
Gender nonconformity -- Religious aspects -- Judaism
Gay people -- Religious life -- United States
Subject headings tend to lag behind terminology used today, meaning some subject headings may be outdated or considered incorrect (and even offensive). For example:
