High voltage due to power failure: The SPIEGEL bestseller finally in paperback! On a cold day in February, all power grids in Europe break down. A total blackout. The Italian computer scientist Piero Manzano suspects a hacker attack and tries to warn the authorities - without success. When Europol Commissioner Bollard finally listens to him, dubious emails appear in Manzano's computer, drawing suspicion on himself. He has become the target of an opponent who is as cunning as he is merciless. Meanwhile, all of Europe lies in darkness, and the fight for survival begins...