Order of Crosstime Traffic Books
Crosstime Traffic is a series of science fiction YA novels by American novelist Harry Turtledove. Travel between parallel universes is now possible, with the Crosstime Traffic corporation owning a global monopoly on the new technology.
The Crosstime Traffic series began in 2003 with Gunpowder Empire. Below is a list of Harry Turtledove’s Crosstime Traffic young adult series in order of when the books were originally released:
Publication Order of Crosstime Traffic Books
| Gunpowder Empire | (2003) |    |
| Curious Notions | (2004) | |
| In High Places | (2005) | |
| The Disunited States of America | (2006) | |
| The Gladiator | (2007) | |
| The Valley-Westside War | (2008) | |