From publisher blurb:
A Train Ride into Danger!
Hundreds of onlookers crowd the railway platform, eager to catch a glimpse of the Duchess Elisabeth as she departs on her maiden journey along the new Paris-München-Vienna Express Line. This train, the most advanced in the world, will allow travel from one end to the other in a mere two days instead of the normal three! Operated by an advanced Babbage Engine and appointed with the finest of luxuries, this train represents the firm alliance of France, Bayern, and the Austrian-Hungarian Empire and serves as a showpiece of their technological prowess.
A prowess one particular mastermind covets with all his black heart…