This is the long-awaited magnum opus from 'strategy's strategist'. Even though everyone is talking about it, there is no concept in business today more muddled than 'strategy'. Richard Rumelt, described by "McKinsey Quarterly" as 'a giant in the field of strategy' and 'strategy's strategist', tackles this problem head-on in a jargon-free explanation of how to develop and take action on strategy…