Exponential was 20 years in the making. It is the story of how Jon, myself and our friends reproduced leaders, artists, groups, teams, campuses, churches and now networks in pursuit of the dream of seeing movement of reproducing churches. Then last month Exponential made it's debut and has been greeted with lots of enthusiasm. Since then it has already gone into a second and now a third printing! Thanks to all the people that already bought a copy and thanks to so many friends who have helped get the word out. Our hope is that this book will inspire lots of people to believe that you and your friends can start a missional church movement.