The Unification Tool is a tricky but effective advertising tool. Unification recruits an existing resource and forces it to carry the advertising message. That resource can come from within the medium itself or within the environment of the medium. In other words, the tool uses an existing component of the medium or of its environment in a way that demonstrates the problem or the promise to be delivered. The tool is one of eight patterns embedded in most innovative commercials. Jacob Goldenberg and his colleagues describe these simple, well-defined design structures in their book, "Cracking the Ad Code," and provide a step-by-step approach to using them. The tools are: