"Jack and Jill" by Louisa May Alcott is a children's novel serialized between 1879-1880. Two best friends suffer a devastating sledding accident that leaves Jack with a broken leg and Jill with a potentially crippling back injury. As they face long recoveries together in the Minot family home, the children struggle to keep up with their studies, navigate difficult truths, and maintain hope. Meanwhile, their friends Molly and Merry pursue their own "missions" of self-improvement, leading to unexpected challenges in their small New England village.