John Peter Lange’s Commentaries on the Holy Scriptures

The Internet Archive has Johann Peter Lange's Commentaries on the Holy Scriptures:

Volume 1 (Genesis)
Volume 2 (Exodus; Leviticus)
Volume 3 (Numbers; Deuteronomy)
Volume 4 (Joshua; Judges; Ruth)
Volume 5 (1 Samuel; 2 Samuel)
Volume 6 (1 Kings; 2 Kings)
Volume 7 (1 Chronicles; 2 Chronicles; Ezra; Nehemiah; Esther)
Volume 8 (Rhythmical Version of Job; Job)
Volume 9 (Psalms)
Volume 10 (Proverbs; Ecclesiastes; Song of Solomon)
Volume 11 (Isaiah)
Volume 12 (Jeremiah; Lamentations)
Volume 13 (Ezekiel; Daniel)
Volume 14 (The Minor Prophets: Hosea; Joel; Amos; Obadiah; Jonah; Micah; Nahum; Habakkuk; Zephaniah; Haggai; Zechariah; Malachi)
Volume 15 (The Apocrypha)

(Matthew)

(Mark; Luke)
Volume 16 (Gospel of John) 

(Romans)
Volume 17 (Galatians; Ephesians; Philippians; Colossians) 

(1 Thessalonians; 2 Thessalonians; 1 Timothy; 2 Timothy; Titus; Philemon; Hebrews)

(James; 1 Peter; 2 Peter; 1 John; 2 John; 3 John; Jude)
Volume 18 (Revelation; General Index)