401. That’s an error.

Your client does not have permission to the requested URL /books?id=2iBKAAAAcAAJ&pg=PA186&lpg=PA186&dq=adouna+en+wolof&source=bl&ots=VekOMLsB7i&sig=wb6Rppf9NmExGwlV38fBUAxA8DU&hl=fr&sa=X&ei=TU1yVLr0E5PaaoWygbAP&ved=0CDgQ6AEwBA. That’s all we know.