Millennium Trilogy: The Girl Who Played With Fire by Stieg Larsson

The Girl Who Played With Fire is the second novel in the best-selling Millennium series by Stieg Larsson.
The book The Girl Who Played With Fire features many of the characters that appeared in The Girl with the Dragon Tattoo, among them the title character, Lisbeth Salander, a brilliant computer hacker and social misfit, and Mikael Blomkvist, an investigative journalist and publisher of Millennium magazine.
The novel The Girl Who Played With Fire is formally divided into a prologue followed by four parts. The prologue of The Girl Who Played With Fire opens with a girl captured and restrained inside a dark room by an unidentified male. To cope with being captured, she mentally replays a past episode when she threw a milk carton filled with gasoline onto another man inside a car and tossed an ignited match onto him. Lisbeth Salander, after finishing the job on the Wennerström affair (described in The Girl with the Dragon Tattoo), disappeared from Sweden and traveled throughout Europe. The novel opens with Salander at the shores of the Caribbean in St. George's, the capital of Grenada. She has become interested in Fermat's Last Theorem and mathematics, an interest that resounds with the opening page of each Part in this novel. From within her room in her hotel she observes on several occasions that her neighbor, Dr. Forbes, an American tourist from Texas, physically abuses his wife next door to her room. (Summary by Wikipedia)