Karen's Accident — Ann M. Martin

From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation!Accidents HappenKaren wants to play outside. Mommy tells her not to go in the treehouse. It is too dangerous. But Karen climbs up anyway. Then she slips and falls. Karen is rushed to the hospital. She has to have an operation. It is going to be scary. But Karen is going to be brave.