S.M. Stirling

The Change occurred when an electrical storm centered over the island of Nantucket produced a blinding white flash that rendered all electronic devices and fuels inoperable. What follows is the most terrible global catastrophe in the history of the human race-and a Dark Age more universal and complete than could possibly be imagined.

The first novel in a brand-new alternate history series where Teddy Roosevelt is president for a second time right before WWI breaks out, and on his side is the Black Chamber, a secret spy network watching America's back. 1916. The Great War rages overseas, and the whole of Europe, Africa, and western Asia is falling to the Central Powers. To win a war that must be won, Teddy Roosevelt, once again the American president, turns to his top secret Black Chamber organization--and its cunning and deadly spy, Luz O'Malley Aróstegui. On a transatlantic airship voyage, Luz poses as an anti-American Mexican revolutionary to get close--very close--to a German agent code-named Imperial Sword. She'll need every skill at her disposal to get him to trust her and lead her deep into enemy territory. In the mountains of Saxony, concealed from allied eyes, the German Reich's plans for keeping the U.S. from entering the conflict are revealed: the deployment of a new diabolical weapon upon the shores of America...

In the mid-1870s, civilization froze in time when comets hit the earth. Instead of advancing technologically, humanity had to piece itself back together. In the 21st century, boats still run on steam, messages are delivered by telegraph, and the British Empire controls much of the world from its capital in Delhi. The other major world power is the Czar of Russia—who is preparing for global conquest.