Who was that man in the Park Service uniform who brought Jack and Ashley Landon into the wilds of...

Grizzly cubs are disappearing from Glacier National Park, and the Landon family must figure out w...

This thrilling series roars back to life with the release of Mystery #13, Night of the Black Bear...

The Landon family makes a trip to Death Valley National Park accompanied by a mysterious new fost...

The Landon family is Southbound—headed for Florida to investigate a mysterious illness plaguing e...

While she studies condors in the Grand Canyon a scientist's life is threatened, and the strange, ...

As the daughter of a Colorado County coroner, seventeen-yearold Cameryn Mahoney is no stranger to...

When a cougar attacks a hiker in Mesa Verde National Park, the Landons have another mystery on th...

Jack can't believe what he's hearing. His sister is being held hostage. Whoever snatched Ashley m...

Grizzly cubs are disappearing from Glacier National Park, and the Landon family must figure out w...

Jack and Ashley's search for eight-year-old Sammy has left them hopelessly lost in a twisted maze...

When Dr. Olivia Landon receives this anonymous e-mail shortly after broadcasting her controversia...