From there he went up against the inhabitants of Debir (now in former times the name of Debir was Kiriath-sepher). Bible see other translations

“Kiriath-sepher.” “Kiriath-sepher” means, “city of the book,” and it was likely where many Canaanite records were kept. Joshua 15:15 is almost exactly the same as Judges 1:11.

“Debir.” Debir is about 10 miles southeast of Hebron and is just off the road from Hebron to Beer-sheba.

Commentary for: Joshua 15:15