Fifty Shades of Grey by E. L. James

Fifty Shades of Grey is a 2011 erotic novel by British author E. L. James. Set largely in Seattle, Fifty Shades of Grey is the first installment in a trilogy that traces the deepening love relationship between a college graduate, Anastasia Steele, and a young entrepreneur, Christian Grey. Fifty Shades of Grey is notable for its explicitly erotic scenes featuring elements of sexual practices involving bondage, discipline, sadism, and masochism (BDSM).
The second and third volumes are titled Fifty Shades Darker and Fifty Shades Freed, respectively. Fifty Shades of Grey has topped bestseller lists in the United Kingdom, United States, and around the world. The Fifty Shades series has sold around 20 million copies worldwide, with book rights having been sold in 37 countries, and set the record as the fastest-selling paperback of all time surpassing the Harry Potter series. Anastasia Steele (Ana) is a young college student who is drafted by her best friend to interview the successful young business magnate Christian Grey for the WSU student newspaper. Ana finds him attractive, confident, commanding, and intimidating. She leaves the interview convinced it went badly; she tries to forget about Grey until he turns up at the Clayton’s hardware store where she works. After Grey leaves the hardware store Ana realizes that she likes him. Grey tries to warn her that he is not a heart and flowers kind of guy, but this makes Ana want him more ... (Summary by Wikipedia)