Originally published as 'Der Ruf der Freiheit', 3rd revised ed. Tübingen: J.C.B. Mohr (Paul Siebeck) 1968.
Jesus means freedom: a polemical survey of the New Testament by Ernst Käsemann. ISBN 0334007755. Published by S.C.M. Press in 1969. Publication and catalogue information, links to buy online and reader comments.