The Girl with the Dragon Tattoo. Again. Just like last year ... and the year before ... and 2014.
In 2018, it was The Girl with the Dragon Tattoo.
In 2016, it was The Help.
In 2015, it was The Girl Who Kicked the Hornet's Nest.
In 2014, it was the first appearance of The Girl with The Dragon Tattoo.
In 2013, it was The DaVinci Code.
In 2012, it was Sixkill by Robert B. Parker (a Spenser mystery).
In 2011, it was The Divine Secrets of the Ya-Ya Sisterhood.
In 2010, it was Scarlett, the Sequel to Margaret Mitchell's Gone with the Wind.
In 2009, it was My Life by Bill Clinton.
In 2008, it was The Da Vinci Code.
In 2007, it was The Nanny Diaries.
In 2006, it was The Corrections.