Fifty Shades Freed most popular book on Amazon in 2012

(REUTERS) - E L James' erotic romance novel, Fifty Shades Freed: Book Three Of The Fifty Shades Trilogy, was the best-selling book on Amazon this year, followed by the thriller Gone Girl, the online retailer said on Friday.

"This was truly the year of the billionaire bad boy in romance," said Ms Sara Nelson, editorial director of books and Kindle at Amazon.com.

"While E L James published the first two books in her Fifty Shades trilogy in 2011, so they aren't eligible for our 2012 list, the series really took off this year and propelled the third installment and the omnibus edition onto our Top 10 list," she added in a statement.

Sylvia Day's Bared To You: A Crossfire Novel came in at No.4 and No Easy Day: The Firsthand Account Of The Mission That Killed Osama Bin Laden by Mark Owen was fifth.