The book written by William Wells Brown is a collection of writings that highlight the contributions of African-Americans, both enslaved and free, in American history, particularly in the Revolutionary War and the Civil War. The book sheds light on the significant role played by black soldiers and activists in these wars, challenging the commonly held belief that African-Americans played a passive role in the country's early history. Brown's writing provides a valuable perspective on the struggles and achievements of black people in America, offering a glimpse into their resilience and courage in the face of adversity.