The Sleepwalkers: How Europe went to War in 1914 by Christopher Clark was quite impressive; at least to me who knew very little about how the First World War started. Of course, I became interested because this is the centenary of the beginning. I more or less read the book during the very same period - a century later- that the book covers: 28 June to 04 August 1914. The beginning and the cause of the beginning was certainly very complex, to say the least.