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.
Encyclopedia of Islam and the Muslim World
by
Richard C. Martin; Gale (Editor)
Encyclopedia of Judaism
by
Sara E. Karesh and Mitchell M. Hurvitz
Encyclopedia of Religion
by
Lindsay Jones, editor in chief
Illustrated Encyclopedia of Hinduism
by
James G. Lochtefeld
New Catholic Encyclopedia
New Catholic encyclopedia. Supplement 2009
World Christian Encyclopedia: a comparative survey of churches and religions in the modern world
by
David B. Barrett, George T. Kurian, Todd M. Johnson
