The slave narrative is a type of literary genre involving the (written) autobiographical accounts of enslaved Africans, particularly in the Americas. Over six thousand such narratives are estimated to exist; about 150 narratives were published as separate books or pamphlets. In the United States during the Great Depression (1930s), more than 2,300 additional oral histories on life during slavery were collected by writers sponsored and published by the Works Progress Administration, a New Deal program. Most of the 26 audio-recorded interviews are held by the Library of Congress. Some of the earliest memoirs of captivity known in the English-speaking world were written by white Europeans and later Americans, captured and sometimes enslaved in North Africa by local Muslims, usually Barbary pirates. These were part of a broad category of "captivity narratives". Beginning in the 17th century, these included accounts by colonists and later American settlers in North America and the United States who were captured and held by Native Americans. Several well-known captivity narratives were published before the American Revolution, and they often followed forms established with the narratives of captivity in North Africa. North African accounts did not continue to compile after the Napoleonic Era; accounts from North Americans, captured by western tribes migrating west continued until the end of the 19th century. Given the problem of international contemporary slavery in the 20th and 21st centuries, additional slave narratives are being written and published. As a literary genre The development of slave narratives from autobiographical accounts to modern fictional works led to the establishment of slave narratives as a literary genre. This large rubric of this so-called "captivity literature" includes more generally "any account of the life, or a major portion of the life, of a fugitive or former slave, either written or orally related by the slave himself or herself". Whereas the first narratives told the stories of fugitive or freed slaves in a time of racial prejudice, they further developed into retrospective fictional novels and extended their influence until common days. Not only maintaining the memory and capturing the historical truth transmitted in these accounts, but slave narratives were primarily the tool for fugitive or former slaves to state their independence in the 19th century, and carry on and conserve authentic and true historical facts from a first-person perspective. They go further than just autobiographies, and are moreover "a source for reconstructing historical experience". The freed slaves