"The Girl With the Dragon Tattoo" is the first in a trilogy set in Sweden written by Stieg Larsson, who died before they were published.  The first book is the story of Mikael Blomkvist, a magazine editor who has lost a libel suit and must get out of town.  He is hired by a wealthy Swedish family to track down Harriet Vanger, who disappeared 40 years ago.  To help in his search, he hires Lisbeth, a young computer hacker.  They are incredibly interesting characters, though a tad outside of the norm.   You can  read more about Lisbeth and Mikael in "The Girl Who Played with Fire", now abailable in hardcover.  The final installment will be published in the US in Mar of next year.