I never read Lindgren's books, but I did watch the Pippi Longstocking movie when I was a kid, and I loved it.
---------- Post added 2012-05-11 at 12:34 AM ----------
Well now you have Stieg Larsson, who I'm reading now, and is absolutely HUGE in the US, so there is a quite famous Swedish author beyond Astrid Lindgren, whom very few people around here actually read.