Trevor Howard Montague (born 20 May 1954) is a British author who compiles books of facts.
Best known for A to Z of Almost Everything, he has since compiled A to Z of Sport, A to Z of Britain and Ireland and A to Z of British (and Irish) Popular Culture.
In 1992 he entered again under a false name, Steve Romana, and wearing a disguise, in breach of the show's rules.
Montague's eligibility was only called into question after a viewer spotted him during a rerun of the show on Challenge.
A judge found the case proved against Montague and awarded damages.