The introduction to this book surveys what we already know about political influence and explains why companies are and are not exactly like other organized political interests that try to influence politics. Companies differ from other organized interests in that they do not exist primarily to further policy objectives, and instead pursue policy objectives as a means to improving their business climate. Companies exist to sell things. This provides insights into how they go about seeking political influence because their audience is a group of people that may not agree with them politically. This chapter also discusses where political influence happens (i.e., anywhere there are governments) and provides an overview of the book.