Sarka and Oliver often make their parents fear that curiosity will harm more than a cat. For these twelve-year-old students, visiting the zoo seems closer to an expedition than a field trip. But while they expect to find lions, tigers, and bears, they don't expect those animals to break free, stranding them amid a zoo gone wild. With predators of all stripes and bites at their heels, the kids would love to flee. But they find they...