Cybernation

Tom Clancy - Cybernation

When web service is disrupted across the world, a new nation makes its presence known. Terrorists from a virtual country called CyberNation have taken the web hostage. Their demands: worldwide recognition and rights for their "citizens." Though there are millions of CyberNation sympathizers, Net Force rallies its troops for an all-out war on three fronts politically, physically, and electronically because dealing with terrorists is never an option...

The Breath of God by Harry Turtledove

The second Opening of the World fantasy novel (after 2007's The Gap) can easily be enjoyed on its own terms. The rise of the Rulers, a powerful group who ride mammoths to war and wield potent magic powers, poses a major threat to the Raumsdalian Empire. Count Hamnet Thyssen, a master warrior, rallies a ragtag mix of magicians, shamans and soldiers against the Rulers, who deal them a crushing defeat.