The Girl with the Dragon Tattoo by Stieg Larsson
Wow, they drink a lot of coffee in Sweden.
Mikael and Lisbeth, the protagonsists, are compelling, the book does a great job of transporting you to Hedeby Island, and the moments of tension and action are great. However, the many details about the Vanger empire and Swedish financial journalism slow things down a bit.
Should I read the sequels?
Geoff Jones is the author of the sci-fi thriller