The New York Times bestselling series is now available in a boxed set of four. What makes a hero? This irresistible, New York Times bestselling biography series answers that question, one great role model at a time. Amelia Earhart, whose adventurous spirit knew no bounds. Abraham Lincoln, who always spoke his mind about fairness. Albert Einstein, whose curiosity made him ask big questions about the world. And Rosa Parks, who dared to stand up for herself and those around her. Four people just like us, who didn't take no for an answer and ended up changing the world.