"...Devotion signifies a life given, or devoted, to God." So begins William Law's Serious Call to a Devout and Holy Life. Originally published in 1729, Law's book stands as a powerful challenge to Christians. Law teaches that if God is "our greatest good," then the wisest way to live is to please God through a life of worship, adoration, and devotion. Since many fail to live this way, Law diagnoses why and suggests certain concrete practices as a remedy. Thus, no one interested in becoming more devout can ignore this dynamic book. Law's call has encouraged several generations, and does not fail to encourage believers even today with a serious call to a devout and holy life.