Easton's Bible Dictionary (1897)
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.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
KIR'JATH-SE'PHER (city of books), mentioned in Josh 15:15 and Jud 1:11, same as Debir and Kirjath-sannah; now Dhaheriyeh.
Hitchcock's Bible Names (1869)
city of letters, or of the book