Great-Uncle Thorne sends Maisie, Felix, and the Ziff twins on a dangerous trip back in time through The Treasure Chest and into the Congo to find Amy Pickworth, Thornes missing aunt. When Maisie and Felix get separated from the twins, they use the magic of The Treasure Chest and find themselves in early twentieth-century Kansas with a young girl named Amelia Earhart.

When their Great-Uncle Thorne falls ill, Felix and Maisie decide to travel back in time to Renaissance Italy to save him. There, they meet and befriend a young Leonardo da Vinci, dine with the great Medici family and celebrate Carnival while coming closer to solving the mysteries of Elm Medona and the Pickworth family.

Return to The Treasure Chest with Felix and Maisie . . .
When Felix Robbins gets a crush on Lily Goldstein, a classmate who is adopted from China, he decides to try to take her back in time so that she can see the country where she was born. Maisie discovers his plot, and foils it. But the twins end up in a small village on the Yangtze River, where they meet a girl named Pearl Buck in the days just before the Boxer Rebellion. With bandits chasing...

Now that the twins have begun to settle into their new lives at Elm Medona, they delve deeper into The Treasure Chest and uncover more about the Pickworth family, including the disappearance of their great-uncle Thorne and the theft of priceless family artifacts.
In this adventure, The Treasure Chest transports Felix and Maisie to tropical St. Croix in 1772. There they meet a young man named Alexander Hamilton who is about to embark on a journey...

On the way in his little red car to share a big pot of stew with his friend, Mr. Winkle is unaware of the long procession forming behind him.

When their parents divorce, twelve-year-old twins Felix and Maisie move with their mother to live in the attic of a historic Newport, Rhode Island, mansion where they discover a hidden room that carries with it an intriguing secret.

"When Felix gets a crush on his friend Lily, who was adopted from China as a baby, he decides to try to take her back in time to learn more about China. After being caught by Maisie, the twins find themselves transported to a small village on the Yangtze River, leaving Lily behind in the present. In China, the twins meet Pearl Buck in the days just before the Boxer Rebellion. With bandits chasing them, they flee to safety in Shanghai. The twins return...