The document provides a book review of "Repositioning" by Jack Trout. It summarizes the key points of the book, including that repositioning adjusts perceptions of a company and its competitors rather than changing people's minds. It involves focusing on a powerful differentiating idea. Repositioning may be needed due to changing customer needs, increased competition, or stagnating benefits. The review outlines difficulties in repositioning like changing consumer perceptions and the time it takes executives to implement changes.