Books on religion are located on the 2nd floor (Reference section) and 3rd floor (Main Stacks) (downloadable floor map) starting with the following Library of Congress call numbers (click for full break down by subclass):
BL - Religions. Mythology. Rationalism.
BM - Judaism.
BP - Islam. Bahaism. Theosophy, etc.
BQ - Buddhism.
BR - Christianity.
BS - The Bible.
BT - Doctrinal Theology.
BV - Practical Theology.
BX - Christian Denominations.
Ebooks can be obtained by searching the Library Catalog (by title, keyword, or author) and then using the "eBooks" limiter under Library Collections on the left side of the page:
Also see the Databases tab for ways to access additional online texts, including ebooks, in religion.
A list of recommended books and ebooks on religion and religious practices.