The new book, titled "Grey," will be published on June 18 -a date that devotees may remember as Christian's birthday.
Since the publication of "Fifty Shades of Grey" in 2011, thousands of readers have written to James requesting Christian's point of view, a news release from James' publisher said.
On the opening page of "Grey: Fifty Shades of Grey as Told by Christian," James writes, "This book is dedicated to those readers who asked...and asked... and asked... and asked for this." In the new work, she will offer her fans the opportunity to see the world of Fifty Shades anew through the eyes of its intriguing and enigmatic protagonist.
"Christian is a complex character," said James. "And readers have always been fascinated by his desires and motivations, and his troubled past. Also, as anyone who has ever been in a relationship knows, there are two sides to every story."
"Given the secrecy and immediacy of the publication, we've worked hard to ensure that the book will be well represented in the retail marketplace on June 18." said Tony Chirico, President of the Knopf Doubleday Publishing Group.
The Fifty Shades trilogy: "Fifty Shades of Grey," "Fifty Shades Darker" and "Fifty Shades Freed" - has reached worldwide sales of more than 125 million copies.
After 25 years working in TV, James decided to pursue her childhood dream, and set out to write stories. The result was the "Fifty Shades of Grey" and its two sequels.