Baccalario, Pierdomenico

In their continuing adventures, Elettra, Sheng, and Minstral meet Harvey and Ermite in New York City and follow the clues to find the mysterious Star of Stone.

In their continuing quest to save the world from evil forces, Mistral, Elettra, Harvey, and Sheng meet again in Paris where they must search for the mysterious veil of Isis reportedly hidden in the heart of the city.

Eleven-year-old twins Jason and Julia, along with their friend Rick, find themselves in ancient Egypt in search of an important map after going through a magical door in their old English mansion.

Jason, Rick, and Julia follow a trail of clues and codes into the past, arriving in eighteenth-century Venice, where they search for the inventions of Kilmore Cove's most famous citizen, Peter Dedalus, who has hidden in the past to protect the mystery of the Doors to Time.

Eleven-year-old twins Jason and Julia, along with their friend Rick, match wits with Peter Dedalus, the elusive inventor who created Kilmore Cove's Mirror House, as they try to uncover the secret hidden somewhere inside before Oblivia Newton can find it.

Eleven-year-old twins Jason and Julia, along with their friend Rick, find themselves in ancient Egypt in search of an important map after going through a magical door in their old English mansion.

After moving from London to an old mansion on the English coast, eleven-year-old twins Jason and Julia discover that their new home has twisting tunnels, strange artifacts from around the world, and a mysterious, locked door.

Four seemingly unrelated children are brought together in a Rome hotel where they discover that they are destined to become involved in a deep and ancient mystery involving a briefcase full of artifacts that exposes them to great danger.