When Christina, Grant and their two friends join their mystery-writing Mimi (and Papa!) on a trip to the "Mile-High City" of Denver, Colorado, they soon find themselves: 

• Sleeping in a mysterious, haunted palace of a hotel! 
• Deciphering mountains of clues to solve a mystery! 
• Reading tattered old books to help solve the clues! 
• Traveling through tricky tunnels to get to a scary ski slope! 
• Meeting an amazing woman who once sailed on the Titanic! 

But can the kids have fun, stay warm and solve a mystery all at the same time? Strap on your skis and come along and see! 

LOOK what's in this mystery - people, places, history, and more! 
Denver winter weather • Rocky Mountain history, facts, and folklore • Mining history and folklore • Old West Santa Fe style buildings and architecture • America the Beautiful song lyrics and author bio • Rocky Mountain Railroads and Old West transportation facts • Anasazi Indian history, lifestyle, and facts • Learning how to ski • Brown Palace Hotel • LoDo (Lower Downtown) • Garden of the Gods • Pikes Peak • Cliff Place at Mesa Verde National Park • Eisenhower Tunnel.