Warfighting has come a long way from machine guns mounted on the back of horse-drawn carriages. New technologies can allow militaries to create and replenish weapons and ammunition on the run; train in virtual environments that they can touch, taste and smell; and command hordes of tiny drones that swarm enemy combatants on command. In many cases, what's standing between the U.S. military and effective implementation of these technologies is trust -- and a thorough understanding of how they work and how they transform the battlespace. That's where Peter W. Singer and August Cole come in. These two military futurists bring new warfighting technologies to life in gripping novels. And their books sometimes inspire generals to take action.