Nicolas (Nick) and Samantha (Sam) Perry are twins. They moved with their parents, their brother Andrew, and their sister Lizzy, to the Colorado town of Hope Springs. The likeable and engaging characters reflect the sensibilities and struggles of being Catholic in the quirky small town of Hope Springs, and in the many adventures that make the teachings of the Church come alive.

In A World of Wonder, the fifth book in the Adventures of Nick and Sam series, the Perry twins take part in the Great Easter Monday Snowball Battle, learn of an amazing mystery revealed in a church fire, and become the subject of a science project. These experiences teach Nick and Sam that God, like the world he created, is mysterious and wonderful.