Essays on Strategy X By Editor: Mary Sommerville Books / Paperback History: Military › Other Military History Publisher: National Defense University Press, January 1993 Price $14.62 Free Shipping Send to a friend Used - Very Good Very Good condition. Spine and cover are scuffed. (Military, defense Strategy, U.S. Defense) $14.62 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.