The Secret at Seven Rocks — Carolyn Keene

IN A WORLD OF WILD ANIMALS, NANCY FACES THE MOST DANGEROUS BEAST OF ALL -- MAN.

Why would anyone want to destroy a wildlife refuge? On vacation in the Rocky Mountain town of Seven Rocks, Nancy vows to find the answer. Blame has fallen on disgruntled hunters, but Nancy suspects that a hunter of a more desperate and dangerous kind is on the loose.

What is the sullen young employee of the refuge trying to hide? And what is the meaning of the threatening note Nancy finds with the mark of a cat in the corner? When she learns from her host, the editor of the local paper, that a man by the name of Alex "the Cat" Catlin has escaped from a nearby prison, Nancy knows she must work fast to unearth the secret long buried at Seven Rocks.