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Cassie, a fifth-grader, embarks on a musical journey with her dad's school band, but feels overshadowed by her talented younger sister, Emily. As she struggles with the clarinet, the pressure mounts, leading to exhaustion and an unexpected bout of chicken pox. Confined at home, Cassie grapples with loneliness and sibling rivalry when Emily also gets sick. Despite challenges and blaming from schoolmates, Cassie cherishes friendship and strives to overcome the issues facing her. Comparable works include Walker Wildcats