In "The Thunder Bird," B. M. Bower likely explores themes related to the American West, ranch life, and the challenges faced by characters in that setting. Bower's novels often featured strong and independent female protagonists, and they provided a glimpse into the cultural and social aspects of the West during the early 20th century.While I don't have a detailed plot summary for "The Thunder Bird," if you enjoy Western fiction with a focus on character development, ranching, and the landscapes of the American West, B. M. Bower's novels may be of interest to you. Bower was a prolific author in the early 20th century, and her works contributed to the popularity of Western literature during that time.