McGrath's book offers apractical guide to the church on how to defend the truth and torespond to the threats posed by these alternative Christianities. The Church's Battle for Truth in a World of Alternative Christianities Every time a long-lost gospel surfaces or an archaeological find about Jesus makes headlines, our fascination with alternative Christianities is reignited. Meanwhile, works of fiction continue to challenge the Church's very foundations. In response, acclaimed church historian Alister McGrath delves into the history of subversive ideas, debunking the myth that heresy is more spiritual or liberating than traditional doctrine. Instead, he presents a compassionate, yet unyielding, orthodoxy that empowers the Church to confront the modern threats of heresy. This timely book serves as a practical guide, equipping the Church to defend truth and respond to the challenges posed by these alternative Christianities.