Publisher's Synopsis
Getting kidnapped by an infamous outlaw gang wasn't on Sofia's list of things to do this summer. But hey, neither was running from Spartans bent on her destruction, and that worked out okay. (Kinda?)
Against all odds, Sofia, Adam, and Hector have stolen the Kronos key from the clutches of their Spartan captors and the burning Kronos temple.
But now the mythical Kronos key, which turns any door into a portal to another time, has taken the trio sometime new: 1869, on the eve of the joining of the transcontinental railroad.
But there's a problem (and that's pretty common for Sofia). The train they're on, the Jupiter, is carrying precious cargo
