>>994Foster's Celebration of Discipline
from wiki:
Foster is best known for his 1978 book Celebration of Discipline, which examines the inward disciplines of prayer, fasting, meditation, and study in the Christian life, the outward disciplines of simplicity, solitude, submission, and service, and the corporate disciplines of confession, worship, guidance, and celebration.It has sold over one million copies. It was named by Christianity Today as one of the top ten books of the twentieth century.