Christianity and its Competitors: The new faces of old heresy, by James McGoldrick (Christian Focus)
Kingdom of the Cults (6th ed.), by Walter Martin (Bethany House)
World Religions and Cults: Counterfeits of Christianity (Vol. 1), eds. Bodie Hodge & Roger Patterson (Master Books).
World Religions and Cults: Moralistic, Mythical and Mysticism Religions (Vol. 2), eds. Bodie Hodge & Roger Patterson (Master Books).
World Religions and Cults: Atheistic and Humanistic Religions (Vol. 3), eds. Bodie Hodge & Roger Patterson (Master Books).
The Evangelical Dictionary of World Religions, Gen. Ed. H. Wayne House (Baker).
The Challenge of the Cults and New Religions, by Ron Rhodes (Zondervan).
Encyclopedic Dictionary of Cults, Sects, and World Religions (Rev. and updated), Eds. Larry Nichols, et. al. (Zondervan).
Index of Cults and Religions, by Watchman Fellowship.
Watchman Fellowship Profiles, various authors.