David L. Baker investigates the theological basis for the continued acceptance of the Old Testament as Christian Scripture, through a study of its relationship to the New Testament. He introduces the main issues, surveys the history of interpretation and critically examines four major approaches. He then considers four key themes, which provide a framework for Christian interpretation of two Testaments in the context of one Bible: 'typology', 'promise and fulfilment', 'continuity and discontinuity', and 'covenant'. He completes his study with a summary of the main conclusions and reflection on their implications for the use of the Bible today.