Welcome to Skyline Zoo, Chicago's newest attraction, filling the top three floors of a skyscraper.  It has everything you could ask for: lions and tigers and bears.  Jordan Clay and her friends are here for an all-night field trip; the students have the zoo to themselves, and they even get to camp out on the floor.  It should be the funnest night of the school year.  

But someone has other plans for them.  In a single moment of horror and panic, everything changes.  Jordan and her friends find themselves trapped inside the zoo, while every cage is opened wide.  Now it will take all their wits and courage to survive the night.  The food chain is no fun when you're suddenly not at the top of it.

Hiking in the Alaskan wilderness, Travis Chase finds the undiscovered wreck of a Boeing 747.  He is drawn into the world of those who were aboard this aircraft, and the terrifying cargo it was transporting.

Travis Chase gains possession of a device that opens a door to the future--eight decades from now, a world in ruins. He must investigate those ruins to learn what happened.  Whatever it is, it's only months away in the present.

More than thirty years ago, humanity received a message from someplace else in the universe. Travis Chase learns of a secret war that has raged since the arrival of that message--the most powerful people in the world have been fighting over what it meant, and what it may lead to. Now Chase learns that he himself is tied to this war, for reasons he can't understand. But he's about to.  

Sam Dryden meets a terrified young girl who's being pursued by men with guns. He helps her escape, and quickly learns why they're after her--though the truth is deeper than even she knows, and the stakes are global.

Dryden is pulled into the chain of events surrounding an astonishing machine, which receives radio signals from ten hours in the future. It can do terrible things in the wrong hands, and it's already in them.

As a child, Sam Dryden witnessed something he shouldn't have, and the United States government moved Heaven and Earth to bury it--nearly killing him in the process.  Now, all these years later, someone is unearthing the secret, and some of the same lethal characters from back then are after Dryden, afraid of what he might remember.  But this time around, Dryden isn't a child; in fact he's the last person on Earth they should have messed with.