The ending
Okay, I haven't found any online forums that deal with the book and most of you seem to know the book pretty well and I have a question if anyone feels like answering it.
(spoiler alert)
Okay, in the end the Swede hears his father in the other room scream "NO!" and he imagines that Merry has shown up and has told his father about the other murders. The Swede then imagines that his father dies of a heart attack.
BUT
In actuality his father just got stabbed in the eye with a fork. I only read the book once but I got the impression that the father died much later.
I was pretty sure this interpretation was correct, but then I came across an essay that seemed to believe the Swede's take on the situation was the correct one.