By KENNETH POSNER

Review of Grit: The Power of Passion and Perseverance, by Angela Duckworth

By KENNETH A. POSNER

Review of The Rise of Superman: Decoding the Science of Ultimate Human Performance, by Steven Kotler

Review of Wiser: Getting Beyond Groupthink to Make Groups Smarter by Cass Sunstein and Reid Hastie

By KAI SPIEKERMANN

Review of WISER: Getting Beyond Groupthink to Make Groups Smarter, by Cass R. Sunstein and Reid Hastie