J. Dudley Woodberry (PhD, Harvard University) is Dean Emeritus and Senior Professor of Islamic Studies at Fuller's School of Intercultural Studies. He is considered one of the foremost Christian scholars of Islam and served as consultant on the Muslim world to President Carter.

The lands where Muslims, Jews, and Christians have encountered each other are littered with the ruins of fortresses. Each faith community built barriers to keep out the enemies of their faith. The present studies look at the barriers erected by peoples considered resistant to the gospel, and the bridges God is using to carry the gospel to them.