When Mary Jackson was growing up, she thought being an engineer was impossible for her. Why? After all, she was fantastic at math and science. She worked really hard to learn all she could in school. Why did this smart little girl think she couldn't be an engineer? In Human Computer: Mary Jackson, Engineer, readers ages 5 to 8 explore the life of Mary Jackson, who overcame the challenges of segregation and sexism to become the first female African American engineer at NASA!