His second book is a response to and critique of The Spirit Level : Why More Equal Societies Almost Always Do Better .
His second book is the Spirit Level Delusion : Fact - checking the Left 's New Theory of Everything ( 2010 ) .
His second book , The Spirit Level Delusion : Fact - checking the Left 's New Theory of Everything ( 2010 ) , is a response to and critique of The Spirit Level : Why More Equal Societies Almost Always Do Better .