Alane Ferguson

In this fast-paced adventure, the Landons trail a wounded wolf in Yellowstone National Park. The park is abuzz with rumors of a wolf attack. Meanwhile, a killer stalks the woods. Unaware of the danger, Jack and Ashley are more concerned about rebellious teenage foster child, Troy Haverson. From the opening moments at Old Faithful through 48 action-packed hours, the tension builds: What is lodged in the wolf's radio collar? And what is the meaning

...

Jack, Ashley, and their unreliable new foster sister set out to solve the mystery of why whales are beaching themselves at Acadia National Park.

While visiting the Everglades National Park with their parents, the Landon children uncover the mystery of dying manatees and learn important lessons about the natural environment.

The Landon family travels to Glacier National Park to investigate why grizzly bear cubs are disappearing and becomes involved with a ten-year-old Mexican runaway boy.

While lost in a tunnel at Carlsbad Cavern, thirteen-year-old Jack, eleven-year-old Ashley, and their eight-year-old foster brother, Sam, think bats and darkness are their worst problems, until they stumble across thieves.

The Landon family makes a trip to Death Valley National Park accompanied by a mysterious new foster child, fourteen-year-old Leesa Sherman.

Twelve-year-old Jack, his younger sister, and the family's teenage foster child Troy go to Yellowstone National Park, where Jack's mother, a wildlife veterinarian, is investigating the report that wolves reintroduced to the park have killed a dog there.