(CNN) -- Harry Potter fans can soon go four books deeper into the world of wizarding.
(Image Source: MGN)
Pottermore Publishing, J.K Rowling's website, plans to release a series of short, non-fiction E-books exploring the "traditional folklore and magic at the heart of the Harry Potter series."
The collection will center on various Hogwarts lessons.
The first titles -- "A Journey Through Charms and Defense Against the Dark Arts" and "A Journey Through Potions and Herbology" -- -- will be published on June 27.
In two decades, half a billion Harry Potter books have been sold and the series has been translated into 80 languages, according to the series' official site.