George Lings heads up Church Army's research unit, The Sheffield Centre, which for over a decade has been at work discerning the evolving mission of the church and the resultant fresh expressions of church. He has written over 50 booklets on the evolving theory and practice of bringing to birth fresh expressions of church, through the Encounters On The Edge series, which had an international subscription base of 500. Moreover the content of his book proposal has been peer-tested for academic rigour for it rests upon the findings of a recent PhD.