Easton's Bible Dictionary

Kirjath-sepher - city of books, Josh. 15:15; same as Kirjath-sannah (q.v.), now represented by the valley of ed-Dhaberiyeh, south-west of Hebron. The name of this town is an evidence that the Canaanites were acquainted with writing and books. "The town probably contained a noted school, or was the site of an oracle and the residence of some learned priest." The "books" were probably engraved stones or bricks.