Book 9: Chasing Orion by Kathryn Lasky
This historical fiction young adult novel is set in Indiana in 1952 during the polio epidemic. Eleven year old Georgie Mason and her family have moved across town to a new home during the summer. When Georgie discovers that the teenaged girl living next door has polio and lives in an iron lung, she becomes fascinated with learning about the condition and getting to know Phyllis. Even though the two become what appears to be fast friends, Phyllis has her designs set on Emmett, Georgie's brother.
This was a fascinating coming of age novel. Georgie, with the help of her new school friend Evelyn, realizes that the situation between Phyllis and Emmett is very powerful and almost out of control. She must save her brother from making a horrible mistake while he is captivated by Phyllis.