Passage Summary: If you're a happy book, you'll be a hit. Since these scary books aren't happy, they probably won't be hits.

Conclusion: Gloomy books predicting terrifying times are unlikely to be very popular.

Reasoning: Utopian books are always popular; gloomy books are not utopian; therefore, gloomy books will not be popular.

Analysis: The flaw here is an 'Inverse Error' or 'Negating the Antecedent.' The author says 'If Utopian, then Popular.' They then observe 'Not Utopian' and conclude 'Not Popular.' This is logically invalid because there could be many other reasons a book becomes popular (like being a thrilling horror novel). To match this, look for an answer choice that follows the structure: 'If A, then B; this thing is not A; therefore, this thing is not B.' We need to find that same 'all-or-nothing' logic applied to a different subject.