El finado doctor Walter Martin escribi� doce libros y fuereconocido como el "padre" del movimiento cristiano moderno en contrade las sectas. Fue fundador y presidente del Christian ResearchInstitute y conductor del programa radial difundido a nivel nacional The Bible Answer Man.
Ravi Zacharias was born in India, immigrating to Canada at age twenty. After earning a Masters of Divinity at Trinity Evangelical Divinity School, he began a speaking ministry that has taken him worldwide (including the campuses of Harvard, Princeton, and Oxford University) as a recognized authority on comparative religions, cults, and philosophy. Zacharias' holds three doctorate degrees, and his books include the Gold Medallion winner Can Man Live without God, Deliver Us from Evil, Cries of the Heart, Jesus Among Other Gods, and two children's titles. He teaches a weekly, international radio program entitled Let My People Think. Ravi lives with his wife, Margaret, in Atlanta. They have… three grown children.