The Pied Piper argues that the 21st century has seen the almost uncritical acceptance of a new paradigm for the Christian faith in New Calvinism, largely through the influence of one man, John Piper. This groundbreaking book takes a critical and incisive look at this development. In the legend of The Pied Piper the children of Hamelin were lured from the safety of the city by the enchanting music of the Piper, and so perished. This book argues that with New Calvinism has come a confluence of holy doctrine and unholy living, a phenomenon which can only bring a curse and not a blessing. The Pied Piper takes a close look at Piper’s doctrine, examining its antinomian and ecumenical flavour, as well as examining the legacy of Piper’s teaching in those closest to him, his own family. New Calvinism’s influence on the wider church is also assessed, with a focus in particular on Northern Ireland, once described as “the last bastion of Christian truth in Europe“. The book argues for a return to the sincerity of true faith, practical church discipline, and a pure gospel.