Three kids get caught up in an adventure of historic proportions! Anna, José, and Henry are complete strangers with more in common than they realize. Snowed in together at a chaotic Washington D.C. airport, they encounter a mysterious tattooed man, a flamboyant politician, and a rambunctious poodle named for an ancient king. Even stranger, news stations everywhere have announced that the famous flag that inspired "The Star-Spangled Banner" has been stolen! Anna, certain that the culprits must be snowed in too, recruits Henry and José to help catch the thieves and bring them to justice. But when accusations start flying, they soon realize there's more than justice at stake. As the snow starts clearing, Anna, José, and Henry find themselves in a race against time (and the weather!) to prevent the loss of an American treasure.

A fast-paced mystery from the author of CAPTURE THE FLAG! José, Anna, and Henry are junior members of the secret Silver Jaguar Society, sworn to protect the world's most important artifacts. When they discover that the society's treasured Jaguar Cup has been replaced with a counterfeit, the trio and their families rush to the rain forests of Costa Rica in search of the real chalice. But when the trail runs dry, new mysteries emerge: Who can they trust? Is there a traitor in their midst? With danger at every turn, it will take more than they realize for José and his friends to recover the cup before it falls into the wrong hands.

When the world's greatest masterpieces are stolen, it's up to three kids to track down the culprits! Henry, Anna, and Jose head from Boston to Paris for their most dangerous mission to solve the mystery of an international art heist! Shortly after they arrive, they learn that a member of the Silver Jaguar Society is working as a double agent, passing information to the criminal gang the Serpentine Princes—but who could it be? When the senior members of the Society go missing, it's up to Henry, Anna, Jose, and their smug new comrade, Hem, to mount a rescue while staying hot on the trail of a missing masterpiece. Running around—and below—a foreign city filled with doppelgangers, decoys, and deceit, the three sleuths discover they're the only hope for the Society's survival!