Anyone who deals with organizing and communicating data needs to read and periodically review this classic work.<br>It will not give you the answer, but will stimulate you to think of different ways to present information with more depth and clarity.  The concepts and examples will change your perspective and will absolutely improve the quality of your work.  If you get just get a single chart improvement idea from the concepts presented, it is well worth the cost and time.  Keep it on a bookshelf close by.