Autobiographies take the cake.
"The Letters of William James, Vol. II"
William James
And yet these Memoirs are perhaps the most valuable document which we possess on the society of the eighteenth century; they are the history of a unique life, a unique personality, one of the greatest of Autobiographies; as a record of adventures, they are more entertaining than Gil Blas, or Monte Cristo, or any of the imaginary travels, and escapes, and masquerades in life, which have been written in imitation of them.
"The Memoires of Casanova, Complete The Rare Unabridged London Edition Of 1894, plus An Unpublished Chapter of History, By Arthur Symons"
Jacques Casanova de Seingalt
"That's a question that I often ask myself, Miss Valerie," replied he, "as they say in some Autobiographies.
"Valerie"
Frederick Marryat