Passage Summary: Just like a traveler learns more by staying in one city for a week than by rushing through five cities in the same time, a reader gains more understanding by savoring a few books.

Conclusion: It is better to read a small number of books slowly and deeply than to read many books quickly.

Reasoning: Reading for pleasure is analogous to traveling for pleasure; both aim for understanding rather than information, and in travel, spending more time in fewer places is superior for gaining understanding.

Analysis: The argument relies on a 'depth over breadth' analogy. To strengthen it, we need to confirm that the comparison between reading and traveling holds true or that the goal of 'understanding' is actually better served by the slow approach. Look for an answer that reinforces the idea that speed-reading or high-volume reading fails to produce the specific type of understanding the author values. If the analogy is the heart of the argument, making that heart beat stronger is your goal.