Eleanor Coerr

Hospitalized with the dreaded atom bomb disease, leukemia, a child in Hiroshima races against time to fold one thousand paper cranes to verify the legend that by doing so a sick person will become healthy.

Ariel almost causes her famous mother to lose a balloon race and then helps her win it.

Sixteen-year-old Bill finds adventure when he becomes a rider for the Pony Express (though his letters home never hint at the dangers he encounters)