In the run up to this weekend's release of the seventh and final book in the Harry Potter series, Harry Potter and the Deathly Hallows, I stand in awe at the product of J.K. Rowling's imagination. She didn't strike oil, or invent a new telephone, or learn to sink a corner jumper. She created an industry with only the vision in her mind. From the first pencil scratches of a penniless mother in 1996, her created world has grown to what Advertising Age estimates is now a $15 billion business. Even better, I see this as a business with a very long tail, as the millions of readers, many of them adolescents, will canonize the series and lovingly share it with their own children.



