Joe Nocera has a provocative parenthetical in his list of the best business non-fiction books:
“Liar’s Poker”, by Michael Lewis (even though I’ve since become convinced that the anecdote that gives the book its title never happened).
The title, and its accompanying anecdote, is half the book. (The other half is the phrase "big swinging dicks".) If it never happened, it bloody well should have.