I'd like to nominate -
"Augustus Carp, Esq. - Being the Autobiography of a Really Good Man" by Henry Bashford
From
amazon.com:
'Bashford's comic 1924 volume offers the mock autobiography of Augustus Carp, a self-aggrandizing, stuffy, puritanical oaf, who indulges in numerous vices in the name of Christianity, rationalizing his own weaknesses while condemning others for the same acts. Great fun.'
Patricia has made this book freely available here.