Christian

Biblical
Genesis 
Exodus
Leviticus
Numbers
Deuteronomy
Joshua 
Judges 
Ruth
1 Samuel
2 Samuel
1 Kings
2 Kings
1 Chronicles
2 Chronicles
Ezra
Nehemiah 
Esther 
Job
Psalms
Proverbs
Ecclesiastes
Song of Solomon 
Isaiah 
Jeremiah 
Lamentations 
Ezekiel 
Daniel
Hosea 
Joel
Amos
Obadiah
Jonah
Micah
Nahum
Habakkuk 
Zephaniah 
Haggai 
Zechariah
Malachi
The Gospel according to Matthew
The Gospel according to Mark
The Gospel according to Luke
The Gospel according to John
Acts
The letter to the Romans
The letter of 1st Corinthians
The letter of 2nd Corinthians
The letter to the Galatians
The letter to the Ephesians
The letter to the Philippians
The letter to the Colossians
The first letter to the Thessalonians
The second letter to the Thessalonians
The first letter to Timothy
The second letter to Timothy
The letter to Titus
The letter to Philemon
The letter to the Hebrews
The letter of James
The first letter of Peter
The second letter of Peter
The first letter of John
The second letter of John
The third letter of John
The letter of Jude
The Book of Revelation

All of Grace by Charles H. Spurgeon
95 Theses by Martin Luther
On the Bondage of the Will by Martin Luther
Small Catechism by Martin Luther
Large Catechism by Martin Luther
Enemies of the Cross of Christ by Martin Luther
Christ Our Great High Priest by Martin Luther
The Twofold Use of the Law & Gospel: "Letter" and "Spirit" by Martin Luther 
Of The Office of Preaching by Martin Luther
The Parable of the Sower by Martin Luther
Christ's Holy Sufferings by Martin Luther
On Faith & Coming to Christ by Martin Luther
The Wheat and The Tares by Martin Luther 
Address to the Nobility by Martin Luther
Summa Theologica by Thomas Aquinas
Writings of Francis of Assisi 
The City of GOD by Augustine of Hippo