Armor: The Decisive Difference By Books / Paperback History: Military › Other Military History Publisher: Du Pont; Kevlar Marketing, Price $13.93 Free Shipping Send to a friend Used - Very Good Very Good condition. Slipcase Good. (Armor, military equipment) $13.93 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.