National Geographic Society
National Parks Mystery Series
All Written By Gloria Skurzynski and Alane Ferguson
Mystery #1 - Wolf Stalker � Yellowstone National Park
Mystery #2 - Cliff-Hanger � Mesa Verde National Park
Mystery #3 � Deadly Waters � Everglades National Park
Mystery #4 � Rage of Fire � Hawaii Volcanoes National Park
Mystery #5 � The Hunted � Glacier National Park
Mystery #6 � Ghost Horses � Zion National Park
Mystery #7 � Over The Edge � Grand Canyon National Park
Mystery #8 � Valley of Death � Death Valley National Park
Mystery #9 � Escape from Fear � St. John National Park, Virgin Islands