Alex Haley was a prominent African American writer and journalist who is best known for his book "Roots: The Saga of an American Family." Published in 1976, "Roots" traces Haley's own lineage back to Africa through seven generations, detailing the experiences of his ancestors from capture and enslavement in Africa to their struggles for freedom and ultimately their journey to America.

"Roots" was a groundbreaking work that brought the history of slavery and the African American experience to a wider audience. The book was also adapted into a hugely popular television miniseries in 1977, reaching millions of viewers and further solidifying its place in American culture.

Alex Haley's work on "Roots" not only raised awareness about the horrors of slavery but also inspired many African Americans to explore their own genealogy and history. Haley's meticulous research and storytelling skills have made "Roots" a lasting and important contribution to Black history and literature.