Real kids, real places

Christina, Grant and their two friends join their parents on a trip to Denver, Colorado, and find themselves in the middle of a mystery involving a haunted hotel and a scary ski slope.

Christina, Grant and their friends follow the Constitution throughout history in an attempt to save it from destruction.

Christina, Grant, and their new friends, Sean and Annabelle, jump into a mystery involving stolen silver dollars on a tour of Hershey's Chocolate World in Pennsylvania.

Christina, Grant, Raven, and Hunter arrive in north Alaska for the Iditarod Trail dogsled race just in time to pursue a runaway team with a renegade musher.

Mimi, Papa, Christina, and Grant make an emergency landing on Diamond Shoals off the North Carolina coast and encounter a mysterious light on the beach.

Young Christina and Grant and their cousins Zander and Dakota go on a trip to Denver with their mystery-writer grandparents intending to do nothing but ski and have fun, but they soon find themselves at a haunted hotel with a mystery on their hands.

Christina, Grant, Juan, and Rose find themselves in big trouble while trying to solve a mystery at the Alamo that their mystery book-writing grandmother says doesn't exist.

Four young people share a Christmas Eve mystery in the White House.

While learning about the Underground Railroad, four young people get the chance to solve a mystery as well.

Christina, Grant, Mimi and Papa fly the Mystery Girl and take the mystery boat, Mimi, to all the Great Lakes on a wild and watery, adventurous mystery of shipwrecks, haunted lighthouses, and island intrigue!.