Start with Why by Steve Sinek
I was given this book by a client I have journeyed with since 2008. It focuses entrepreneurs on articulating why they exist (beliefs), how they are differentiated (focus) and what they do (products and services). This strategic framework of three concentric circles provides a helpful model for leaders to define and then use to focus their organisations on creating sustainable competitive advantage .
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I came, I read this article, I conequred.