The ads are in magazines for older people in the US, and use words and phrases from the books to try and get them interested in Harry Potter.
Will the ads convince bikers like these to read Potter?
One's got a big tattooed biker standing in it, alongside the words "Flying cars. Fire Whiskey. Death Eaters," followed by "We all have our reasons. What's yours?"
Skaters and couch potatoes are also included in the ads, that are trying to convince people that there are things in the books that will interest them.