memoir

noun3

1. •
   An autobiography; a book describing the personal experiences of an author.

   • When I retire, I'm going to write my memoirs.
2. •
   A biography; a book describing the experiences of a subject from personal knowledge of the subject or from sources with personal knowledge of the subject.

   • James wrote a memoir of his grandmother shortly after she passed away.
3. •
   Any form of narrative describing the personal experiences of a writer.