This is book number 51 in the The Boxcar Children Mysteries series.
The Boxcar Children love exploring the train, watching the beautiful scenery from the observation car, and eating in the dining car. But the train ride gets really interesting when they meet a young woman who has had something very valuable stolen from her. Can the Aldens solve the mystery before the train pulls into the last stop?
The Boxcar Children series was created by Gertrude Chandler Warner, a teacher, when she realized that there were few, if any, books for children that were both easy and fun to read. She drew on her own experiences in writing the mysteries. As a child, she had spent hours watching trains near her home, and often dreamed about what it would be like to live in a caboose or freight car. In each story, she chose a special setting and introduced unpredictable, unusual or eccentric characters, to help highlight the Aldens’ independence and resourcefulness. Miss Warner lived in Putnam, Massachusetts until her death in 1979.