Sanctification is found in the BT 765 to BT 767 range. Additional material can be found under Christian Spirituality which is BV 4500+
Calvin's Doctrine of the Christian Life by 
Golden Booklet of the True Christian Life by 
The Gospel Mystery of Sanctification by
other editions are available for free on google books and internet archive
The Hole in Our Holiness by 
Instruments in the Redeemer's Hands by 
Overcoming Sin and Temptation by 
The Pilgrim's Progress by 
Spiritual Disciplines for the Christian Life Study Guide by 
