In advertising the principle of Caveat Emptor is alive and well. Caveat Emptor means, "Let the buyer beware." Could a reference that thoroughly covers the advertising media buying and selling functions be helpful to you as an entrepreuer, professional or student/faculty? Check out this up-and-coming title Media Planning and Buying in the 21st Century, by Ronald Geskey, Sr. today.
http://www.21stCenturyMediaPlanning.com
http://www.21stCenturyMediaPlanning.com