Fly Girls: How Five Daring Women Defied All Odds and Made Aviation History by Keith O'Brien

Text from the back cover:

In the years between World War I and World War II, airplane racing was one of the most popular sports in America -- when the pilots were male. Women who flew planes were often ridiculed by the press, and initially the weren't invited to race. Yet a group of women were determined to take to the sky, no matter what. Fly Girls follows the stories of five remarkable women: Florence Klingensmith, Ruth Elder, Amelia Earhart, Ruth Nichols, and Louise Thaden. Together, they fought for the chance to race against the men -- an in 1936 one of them would triumph in the toughest race of all.