The worst field trip ever!
Cassie thought that spending her Spring Break going on a field trip to Seattle with her two best friends would be great. She’d never ridden on a train or ferry before, and had certainly never toured an underground city.
But her fifth grade field trip soon becomes a nightmare when a stranger stalks them through the streets of Seattle.
Can Cassie and her friends outwit the stranger and get out of the underground city alive?
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