Alan Gomes specializes in the history of Christian doctrine and in the theology of American religious cults. Gomes is series editor of the 15-volume Zondervan Guide to Cults and Religious Movements, and wrote three books in the series: Unmasking the Cults (the introductory volume to the series), Unitarian Universalism and Truth and Error: Comparative Charts of Cults and Christianity. He also edited an updated edition of W.G.T. Shedd's Dogmatic Theology (Presbyterian and Reformed Publishers, 2004). He has contributed articles to numerous journals, including Westminster Theological Journal, Trinity Journal, Presbyterion, and Christian Research Journal. Gomes has spoken at churches throughout Southern California and has been a featured guest on radio shows across the U.S.