A runaway self-improvement bestseller widely praised for turning behavior science into simple, actionable systems; some readers find its ideas familiar but appreciate the practical framing.
Goodreads — Millions of ratings average around 4.3 stars; readers call it clear and genuinely useful for building small habits.
Wikipedia — Notes the book topped the New York Times bestseller list and has sold well over 15 million copies worldwide.
Aggregated from public reviews; quotes belong to their authors. As an Amazon Associate, gadzoom.ai earns from qualifying purchases.
Signals behind this ranking
measured Sep 7, 2026
Countable evidence gathered in our research round — not our opinion.
How popular
Amazon ratings149,746
Best Sellers Ranknot measured
New ratings / daynot measured
YouTube reviews found7
Reddit threads foundnot measured
How trusted
Average rating4.8 ★
1–2 star sharenot measured
Independent reviews cited8
Amazon badgenot measured
Also sold bynot measured
These feed a 0–100 score (currently 89.5) that, combined with real visitor clicks, sets this product's position. Signals we could not measure reliably are recorded but excluded from the score.
0 comments
Log in to join the conversation.