Cliff-Hanger - Skurzynski, Gloria, and Ferguson, Alane

While Olivia Landon tries to figure out why a cougar attacked a hiker in Mesa Verde National Park, her children Jack and Ashley have their hands full with a mysterious girl who calls herself Lucky Deal. Includes a park map.

Cliff-Hanger 2001, National Geographic Society

ISBN-13: 9780792276548

Trade paperback

Cliff-Hanger 1998, National Geographic Society, Washington, DC

ISBN-13: 9780792270362