Chief of staff : the principal officers behind history's great commanders. Vol. 1, Napoleonic wars to World War I by David T Zabecki

"The two-volume Chief of Staff examines the history, development, and role of the military duty position of the chief of staff. Many books have studied history's great commanders and the art of command. None have focused exclusively on the chief of staff -- that key staff officer responsible for translating the ideas of the commander into practical plans that common soldiers can execute successfully on the battlefield. In some cases, it is almost impossible to think of certain great commanders without also thinking of their chief of staff. .." - Editorial Reviews