The success of Stieg Larsson in the US is amazing - everywhere you go, every newspaper you read - you'll find the books displayed and can read stories about him and his books. The Americans are obsessed with these books. I always smile when I see people with the books (and you see them everywhere) - thinking how they pronounce Fiskargatan and Bellmansgatan. And suddenly you have a new topic when you meet people - talk about the Millenium books and about Stockholm.
According to the Entertainment Weekly, the last book (named "The Girl Who Kicked the Hornets' Nest" and released in May 2010 in the US) sold 500 000 copies within the first 14 days in the US - which is an average of 35,714 books a day or 1489 books per hour.