We live in a world where your neighbor might be Jewish, Muslim, or Hindu. Introductions to other religions will help you understand your co-workers, friends, and neighbors. Resources on other religions and apologetics will help you communicate your faith to them more effectively.
All You Want to Know But Didn't Think You Could Ask
Guesses, Goofs & Prophetic Failures
Handbook of Today's Religions
The Kingdom of the Occult
Nelson's Guide to Denominations
Nelson's Illustrated Guide to Religions
Religions A to Z
Why So Many Gods?