The Origins of the First and Second World Wars (Frank McDonough)

To get the high scores especially the ones in the level 7, you need to have:

• "Different approaches to, and interpretations of, historical events and topics are explained and placed in their historical context" 
• "At the upper end of this markband the answer will in addition display at least one of the following features: a highly developed awareness of historiographical issues"

This book has exactly all that. It has all the different historians' interpretations about the origins of both the First and the Second World Wars (e.g. Fischer thesis & A.J.P Taylor). More importantly, this book provides an objective and informative analysis of different factors contributing toward the outbreak of the wars (e.g. imperialism & Hitler's rise to power). Above all, it has official and original documents like letters and speech. This book is put together in an easy-to-understand order starting with the First World War, all its contributing factors and historians and the same goes for the Second World War.