Popularity of the Ten Spies is filled with Wisdom Poems on Fear, Influence, Leadership, and Trusting God. The biggest takeaway of this book isn't simply: "Don't listen to popular people." You will finish with something closer to: "Popularity, credibility, expertise, and influence are valuable?but none of them are substitutes for faithfulness to God."
You will have better discernment and become more cautious about automatically equating:
1. popular = true
2. credible = correct
3. experienced = wise
4. majority = right
5. confident = faithful
You may learn to ask:"What does this person actually believe, and does it agree with God's truth?"