If you like The Girl with the Dragon Tattoo series by Swedish author Steig Larsson, you might like the novels of Norwegian author Jo Nesbo. His latest, featuring detective Harry Hole, is

The Devil's Star. The main character, Harry, is complex and the plot developments twisty and engrossing!

And a big (lliterally!) novel to read might be: The Passage by Justin Cronin, which has gotten lots of good reviews.  The characters in this post-apocalyptic quest-for-safety story make it a page-turner similar to Stephen King's The Stand.