As eleven-year-old Willa looks for something extraordinary in her life, her twin, Nicholas, shows her that what is ordinary to some, can be extraordinary to others.
Twelve-year-old Danny thinks that there is something very familiar about the girl who plays shortstop on the team he faces during the championship series, and his curiosity leads him to a surprising discovery about his own adoption.
Distraught at the thought of their parents' divorcing, a brother and sister run away from home and take up residence in Golden Gate Park, where they encounter many homeless people and hear there is a murderer loose among them.
Twelve-year-old Michael, confined to a wheelchair after an accident, uses mental telepathy to communicate football plays to his quarterback twin brother Tom, then suddenly finds himself on the field in his brother's place.
A young orphan, afraid of being sent to the workhouse, finds himself at the mercy of the unsavory owner of a tavern in Alexandria, Virginia, while he tries to solve the mystery surrounding his past and a missing twin.
When twelve-year-old twins Philippa and John discover that they are descended from a long line of djinn, their mother sends them away to their Uncle Nimrod, who takes them to Cairo where he starts to teach them about their extraordinary powers.
In 1932, a twelve-year-old girl who lost her sight in an accident keeps a diary, recorded by her twin sister, in which she describes life at Perkins School for the Blind in Watertown, Massachusetts.
