It looks as though Christian Grey is here to stay for a very long time. The 50 Shades of Grey franchise has hit fever pitch again as E.L. James' latest book, 'Grey: Fifty Shades of Grey as Told By Christian' has sold over one million copies since it debuted four days ago.

Jamie Dornan News 2015: Actor To Call Prague Home This Summer

According to Naughty But Nice Rob, fans flocked to their local bookstores to grab a copy of the book, which is apparently told by the Christian Grey character, which is played by actor Jamie Dornan in the big screen adaptation of the first book.

What's more, the book's publisher Vintage is supposedly pushing for third, fourth and fifth printings of the novel with over 2.1 million reprints being delivered daily across the country.

'Fifty Shades of Grey' News: High School Teacher Shows Movie In Class, Didn't Know What It Was About?

Just recently, Dornan himself defended the franchise, calling 50 Shades a "love story."

According to Ireland's TV3, the Irish hunk said the story is nothing more than two people simply falling in love with each other.

He said, "It's mainly about love. In quite a classic way really - it's just like Shakespeare used to write it. Ana and Christian are two people who, on paper, shouldn't really go together, their worlds couldn't be more different. But they realise how much they need each other and are prepared to change for one another. You can't really get more love film than that, right?"

Keep up with Enstars for all the latest news on Jamie Dornan and the 50 Shades of Grey franchise.