As Gavin Calver had to discover for himself, you can't survive on inherited faith.
He found it tough to be the son of a preacher man. Conscious of the eyes and expectations upon him, he got thrown out of Sunday school, slunk off to smoke in the car park during sermons, and eventually abandoned church entirely in favour of Wimbledon football club, girls and booze.
Today - still a young man - he leads British Youth for Christ.
His passion is to reach the generations that continue to be lost to the faith.
This new edition brings his own story up to date and spells out his remarkable and ambitious vision of how the missing can be shown the path to personal faith.
About 25% of the material is completely new.