Usually Crosstime Traffic concerns itself with trade. Our world owns the secret of travel between parallel continuums, and we mean to use it to trade for much-needed resources with the worlds next door. Preferably without letting them know about any of that parallel-worlds stuff.

But there’s one parallel world that’s different. In it, the atomic war broke out in 1967, at the height of the Summer of Love. Now, Crosstime Traffic has been given a different sort of mission: find out what on earth, or on the many earths, went wrong.

Praise

“Readers nostalgic for the juvenile SF novels of Robert A. Heinlein and Andre Norton will find much to enjoy…Turtledove presents his teenaged heroes with a series of moral choices and dilemmas that will particularly resonate with younger fans. This is a rousing story that reminds us that ‘adventure’ is really someone else in deep trouble a long way off.” — Publishers Weekly on Gunpowder Empire

“The best so far in this series!” — Booklist on The Disunited States of America

About the Author(s)

Harry Turtledove

Harry Turtledove, “the modern master of alternate history” (Publishers Weekly), lives in Los Angeles.

Harry Turtledove's Website

Harry Tutledove's short stories on Tor.com

Excerpt

Chapter One

As Dan neared the top of the Sepulveda Pass, he saw the barricade the Westside had built across the 405. His deerskin boots scuffed on the old, cracked, sun-faded asphalt. Weeds, even bushes, sprouted from the cracks, but the freeway was still the best route south from the Valley. Or it had been, till the Westsiders blocked it.

They saw the Valley war party coming.

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