This is also because this book, along with the others in the trilogy, would not appeal to children, per se. To be able to surpass Harry Potter, even if it is only regarding paperback version sales, is a feat that may be hard to replicate any time soon. It has even surpassed the record set previously by the Harry Potter series. To date, it is the fastest-selling book (in paperback version) of all time, with over 70 million copies sold worldwide-and counting. Despite this fact, however, or rather, regardless of this fact, the novel, along with its sequel Fifty Shades Darker Audiobook, has garnered praise, and such a widespread following. The book was published back in the June of 2011, and has since stirred up controversy. This book follows the relationship of a college graduate, named Anastasia Steele, and a businessman named Christian Grey. It is the first book in a trilogy of romance novels entitled the Fifty Shades trilogy. 50 Shades of Grey Audiobook is the audio adaptation of a novel written by author E.