Mintzberg (management studies, McGill U., Montreal) observes 29 different managers in a wide variety of fields and settings to reveal that these individuals are often so busy with various tasks and activities that they are no longer managing effectively. Written for managers, this guide creates a new management model that shows how the most effective practitioners are the ones who dismiss popular trends of style, hierarchy and culture to focus on reflection, analysis, worldliness, collaboration and proactiveness. An appendix summarizes the eight days the author spent with these managers, with the full account available on the author's website. Annotation ©2009 Book News, Inc., Portland, OR (booknews.com)