For further reading on the topic of Amazing Grace and William Wilberforce: My Soul Has Grown Deep: Classics of Early African-American Literature by John Edgar Wideman
The Slave Ship: A Human History by Marcus Rediker
Great Slave Narratives Selected by Arna Bontemps The Global Eighteenth Century edited by Felicity A. Nussbaum
**The Interesting Narrative of the Life of Olaudah Equiano, or Gustavus Vassa, The African Written by Himself. Edited by Werner Sollors
** Equiano the African:Biography of a Self-Made Man by Vincent Carretta
** These titles are available locally at the public libraries.