An excellent book for the modern world of business. A very practical book that is superbly written and feels very comfortable to work through. Very up to date in its thinking and has its finger firmly on the pulse of todays competitive business arena. It stimulates the mind and I think that helps you to think of business situations from a different aspect.
One of the best books on Marketing of all time I think, well recommended. And for a light hearted slant on persistent marketing, have a look at Simon Ashley Richmond's Write Again Vol 1
it certainly gave me some ideas in lateral thinking.