
'Birth pangs'
The prizing-winning 81-year-old author and academic has written more than 20 works - some fiercely critical of politicians and a failure of leadership in Nigeria.
Chinua Achebe lives in the US following a car accident in 1990
But he has never addressed the atrocities of the Biafran war, in which he was caught up with his young family - except occasionally in his poetry.
More than one million people died during the conflict in fighting and from famine - photographs of starving children from Biafra became synonymous in the media with the conflict.
"There Was a Country is a distillation of vivid observation and considered research and reflection," Mr Achebe's UK publisher Allen Lane says.
"It relates Nigeria's birth pangs in the context of Achebe's own development as a man and a writer, and examines the role of the artist in times of war."
Mr Achebe has lived in the US since he suffered a car accident in 1990, which left him paralysed and in a wheelchair.
The memoir is published in the UK on Thursday and is due to be released in Nigeria shortly and in the US on 11 October, AFP news agency reports.