Sam Archer and her mystery-solving friends have to crack a case at Yellowstone National Park.

Sam Archer and her friends thought their trip to Yellowstone would be free from mysteries. That all changes when a kid is kidnapped!

Yellowstone National Park is the scene of a mystery that Sam Archer and her friends must solve!

At the amusement park, things go wrong for Sam and her friends.

In Washington, D.C., on a field trip, "Egg" Garrison and his friends solve a haunting mystery.