Yes, the fourth Harry Potter book came out in 2000 (the movie didn’t come out until 2005, and the adaptation of the first book didn’t come out until 2001). To say that the 20 years that followed were pretty good for the Harry Potter brand is beyond an understatement. Not only were all of the books filmed, but they also inspired spin-off films (of debatable quality), a Broadway show, and theme park rides at Universal Studios.