while the Old Testament has much to say about them. When Christians created a sacred book of two ‘Testaments’, they turned their brand-new belief system into one which could stand on an ancient sacred tradition and claim to be the most ancient religion of all. Muslims likewise took over this claim to antiquity, remaining conscious of the two older assemblies of books, but Muslims replaced the authority of the two Testaments with a further book which became their supreme revelation of God’s word, the Qur’an. For Christians, that revelation had already appeared in the Jew Jesus of Nazareth.