The success of the "Harry Potter" books and films are no brainer for a lot of the people due to the fact that it brought a lot of brand new things into the book and film world. The seven film released also spanned for almost 10 years and a lot of adults nowadays have grown up watching the "Harry Potter" films. Despite "Harry Potter" having ended at the seventh book, the author, J.K. Rowling has expanded the "Harry Potter" world so that a lot more can be taken and enjoyed from the magical wizarding world.
J.K. Rowling has created an empire that will stand the monuments of time through her "Harry Potter" universe, take for example there is now a "Harry Potter" amusement park, and just recently she has revealed that there will be a play based on a new script she made called "Harry Potter and the Cursed Child." An extension of the "Harry Potter" book has also been adapted into film; the book is called "Fantastic Beasts and Where to Find Them" and was made for charity.
Now, J.K. Rowling is tackling the wizarding world in North America, where in she plans to release a written word on it that will cover over four centuries of the wizarding world in North America. Mostly what J.K. Rowling will spend writing on the new book will be "Skinwalkers," which is called "Animagi" in the "Harry Potter" books.
Already the first part of the History of Magic in North America has been released and J.K. Rowling has written that the counterpart for the British term Muggle (meaning non-magical persons) in North America is "No-maj". J.K. Rowling also wrote in the first part "the Native American magical community and those of Europe and Africa had known about each other long before the immigration of European No-Majs in the seventeenth century."
One can read the first part of a four part series through Pottermore.com