Question: Erika Mitchell (born 7 March 1963), known by her pen name E. L. James, is an English author, She wrote the bestselling erotic romance trilogy, Fifty Shades Freed is which number, and final installment of the erotic romance "Fifty Shades Trilogy"?
Related documents: [0]  [DOC] Fifty Shades Freed is the third and final installment of the erotic romance "Fifty Shades Trilogy" by British author E. L. James. After accepting entrepreneur CEO Christian Grey's proposal in "Fifty Shades Darker", Anastasia Steele must adjust not only to married life but to her new husband's wealthy lifestyle and controlling nature. The paperback edition was first published in April 2012. [END] 
[1]  [DOC] Erika Mitchell (born 7 March 1963), known by her pen name E. L. James, is an English author. She wrote the bestselling erotic romance trilogy "Fifty Shades of Grey", "Fifty Shades Darker", and "Fifty Shades Freed", along with the companion novel ""; and under "Snowqueen's Icedragon" the Twilight fan fiction "Master of the Universe" that was the basis for the Fifty Shades trilogy. [END] 
Answer: 
third
third