Most people have lived through minor power outages lasting anywhere from a few hours to a few days. But what would happen if the power went out and didn’t come back on? Historian William R. Forstchen, Ph.D., warns that if something were to cripple the U.S. power grid — an electromagnetic pulse (EMP) for instance — it would trigger a cascade of deadly events, and long-term survival would depend on being in the right place at the right time with the right food supply.

William R. Forstchen is a New York Times bestselling author and a Professor of History at Montreat College, in Montreat, North Carolina. He holds a doctoral degree from Purdue University with a specialization in military history and technology. He is the author of more than 50 books, including the One Second After series that details the realistic effects of an EMP strike.

He is a noted expert historian and public speaker and has been interviewed on FOX News, C-SPAN and many others on topics ranging from history to technology and cultural issues, to space technology development, to security threats.

Widely considered one of the foremost experts on EMP attacks, Forstchen is also the New York Times bestselling author of the One Second After series, a fictional exploration rooted in the cold, solid facts of how an EMP strike above U.S. soil would impact society.

The latest book in the series, Five Years After, follows protagonist John Matherson as he contends with new threats to the fragile civilization that he helped rebuild.