I love those books, and am eagerly awaiting the sixth one! Aren't they great?! Rowling published the first of the Harry Potter books under Uranus in Aquarius in 1997, six years before Uranus in Pisces...That had to be auspicious for her as Rowling is a Leo and the Leo/Aquarius eclipses were occurring at that time. I have not checked so I am not sure, but I think maybe there was a fixed Grand Cross at that time, too!