J.K. Rowling has more magic on the way. The "Harry Potter" author is launching a series called "Magic in North America," a four-part backstory for this fall's film adaptation of the Potter prequel "Fantastic Beasts and Where to Find Them." Rowling confirms there's an American Hogwarts, could be part of "Fantastic Beasts" Announced on Rowling's Web site, www.pottermore.com, "Magic in North America" will run in installments Tuesday-Friday on Pottermore.