Why the Church must defend the truth.Our ongoing fascination with alternative Christianities is ondisplay every time a never-before-seen gospel text is revealed, an archaeological discovery about Jesus makes front-page news, or anew work of fiction challenges the very foundations of the church.Now, in a timely corrective to this trend, renowned church historianAlister McGrath examines the history of subversive ideas, overturningcommon misconceptions that heresy is somehow more spiritual orliberating than traditional dogma. In so doing, he presents a powerful, compassionate orthodoxy that will equip the church to meet thechallenge from renewed forms of heresy today.