Fifty Shades of Grey is a 2011 erotic romance novel by British author E. L. James. It became the first installment in the Fifty Shades novel series that follows the deepening relationship between a college graduate, Anastasia Steele, and a young business magnate, Christian Grey. It contains explicitly erotic scenes featuring elements of sexual practices involving BDSM.

Fifty Shades is a series of erotic novels by British author E. L. James, initially a trilogy consisting of Fifty Shades of Grey (2011), Fifty Shades Darker (2012) and Fifty Shades Freed (2012). The series traces the deepening relationship between college graduate Anastasia Steele and young businessman Christian Grey. Christian introduces Ana to the world of BDSM.