Treasure chest (Ann Hood)

While exploring The Treasure Chest, Felix and Maisie are transported to a Massachusetts farm in 1836. Disappointed that they have not landed in their beloved New York City, they wonder why they were brought to Massachusetts to meet a young girl named Clara Barton. Perhaps Clara has a message for the twins? Or maybe they have one for her?

"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...

"Felix and Maisie re-enter The Treasure Chest and suddenly find themselves in the midst of a Lakota village. While exploring they meet a young man, soon to be known as Crazy Horse--and embark on an adventure that includes fascinating vision quests and exciting battles"--

"Time travelers Maisie and Felix meet a young Alexander Graham Bell (the inventor of the telephone). When the twins get separated from Alexander, they join the thousands of orphans in the streets of Victorian London"--

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.