Print publishers often revise the cover art in order to appeal to modern sensibilities and kick start sales. The Harry Potter franchise has received many updates over the years, most recently by Scholastic when they partnered with Kazu Kibuishi. Pottermore has just announced that they have developed new cover art for all seven Harry Potter e-books and they should be available at all major digital bookstores in the next few days.
Graphic artist Olly Moss did the new book covers and they have a number of similarities with movie posters. He said in a recent interview that “he was originally inspired by modernist graphic designers like Saul Bass, Paul Rand and, more recently, Jason Munn.”
It is quite rare that e-books receive updated book covers, but Harry Potter tends to buck all modern conventions in the publishing world.