Carl Friedrich Keil and Franz Delitzsch were Nineteenth-century theologians from a German protestant background. They compiled one of the most comprehensive and extensive commentaries on the Old Testament. Their work in the 1800s is still held in high regard throughout theological circles for its meticulous and sound doctrinal commentary. Their work examines the historical and grammatical aspects of the entire Old Testament in Hebrew in their original context so you can easily follow the textual analysis of its intended meaning in its original language.