Whether this Debir is the same with that mentioned, Joshua 10:38. I know not. But if it be, perhaps while Joshua was prosecuting the war in other parts, some of the Canaanites had again entered it and fortified it. The ancient name Kirjath sepher, implied the city of learning: or of a book. Probably a school might have been here. As the Egyptians were learned in arts and sciences, so might have been the ancient kingdoms of Canaan. Acts 7:22.
Related Commentaries of Joshua 15:14
Joshua 15:14-15
14 And Caleb drove thence the three sons of Anak, Sheshai, and Ahiman, and Talmai, the children of Anak.
15 And he went up thence to the inhabitants of Debir: and the name of Debir before was Kirjathsepher.