Olaudah was captured as a boy and kidnapped into slavery in the Americas where he was treated terribly.
After collecting up enough money from other means, he was allowed to buy his freedom in 1766 by his then master Robert King.
Equiano settled in London in 1767 and became a key campaigner / protester against Slavery. For this he became popular with some Londoners but was looked down upon by most people because they held racist ideas.
In 1789 his autobiography was published and was read by many thousands. Equiano married an English woman, Susannah Cullen, in 1792 in Soham, Cambridgeshire. Equiano died in London in 1797, a year after his wife.