Relating to an autograph, or one's own handwriting.(adjective)
Relating to, or used in, the process of autography.(adjective)
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Use "autographical" in a sentence
"A delightfully quirky semi-autographical novel about a talented misfit blessed with the most patient stepfather in history."
"Kiernan's latest novel, The Red Tree August 2009 is in turns a pseudo-autographical novel, a psychological portrait of a first-person narrator on the verge of madness, and a sometimes terrifying mystery that surrounds a particular red oak tree in Rhode Island. link: OF Blog of the Fallen: Caitlín R."
"Sharíf = a royal autographical letter: the term is still preserved in Turkey, but Europeans will write"