the book introduces you to basic conceptual building blocks. the section on which softwares to use is very helpful to jump start. you will be no more confined to the framework and limitations imposed by Excel / PowerPoint
I bought this on checking other reviews as I'm interested in studying data visualisation techniques. What a great, insightful book. Strikes the right balance between technical help, reference guide and inspiration creator... Also would recommend 'Information is Beautiful' by David McCandless, a great example of a good data vis. practitioner.