1.1. Logos eBooks

• The Radical Cross: Living the Passion of Christ by A.W. Tozer
• A Godward Life by John Piper
• First Love by John MacArthur
• Difficult Doctrine of the Love of God by D.A. Carson

1.2. In Bible Dictionaries and Encyclopedias

1.3. In Theological Dictionaries and Encyclopedias

1.4. In Theological Journals

1.5. In Systematic Theologies

1.6. In Other Books

1.7. Books and Treatises