When Masie and Felix's parents divorce, the twelve-year-old twins reluctantly move from New York City to Rhode Island with their Mom, who is distracted by a demanding new job. Their new home is a mansion that once belonged to their great aunt but is now owned by the local preservation society. Living in a historic mansion sounds exciting but the family is restricted to the small, hot servant’s quarters. Expecting their new life in Rhode Island to be boring compared to the hustle and bustle of New York, the twins are in for a surprise when they discover a secret room that transports them to the year 1836, where they meet a young Clara Barton. A short epilogue provides an account of Clara Barton’s life and many contributions during the Civil War and after. While Felix and Masie’s visit to the past is a little slow and their reaction to time travel is blasé, the rest of the story moves quickly and keeps the reader’s attention. Ann Hood’s new series will appeal to Magic Tree House fans who are looking for a more challenging read.