When Bad Snakes Attack Good Children (Secrets of Dripping Fang Series #8)

Before suddenly going (how to put this nicely?) missing, FBI Agent Cromwell had promised to fly twins Wally and Cheyenne Shluffmuffin to Quantico, the FBI facility all the way in Virginia. Somebody's got to tell the authorities about the ont army's plan for world domination. Now it's up to the twins to figure out how to get to Virginia on their own...and, really, what safer way to get there than on a train?

But Wally and Cheyenne aren't entirely on their own. Who knew that Vampire Dad was suddenly going to be enforcing all kinds of rules, like the one where ten-year-old children aren't allowed to ride trains without parental supervision? Plus, they have a new assassin after them, and she's got the perfect cover--I mean, most knife-wielding diabolical killers don't look like sweet little old ladies. And to add to the fun, she's traveling with some exotic, slithery, and very poisonous friends.

If the twins can't reach the FBI in time, the people captured by the ont army are going to die. But, if Wally and Cheyenne are going to save the day, they'll have to make it to Virginia, um, alive.