So Paul said they found a partially finished 4th novel in Sieg Larsson's computer when he died.  Is that a rumor or is it true?
You be the judge:
NY TIMES MAGAZINE
Eva Gabrielsson, Larsson's partner, in Stockholm. Excluded in the division of his estate, she still has a coveted possession: an unfinished fourth novel.
Legally Gabrielsson has no claim, but she has asserted a kind of moral entitlement. She also has a crucial piece of the Larsson legacy: a laptop computer containing roughly three-quarters of a fourth novel. 
... 
der Brucer
The link is to a very long detailed article on the author and his life/estate
"Gabrielsson, now 54, lived with Stieg Larsson from 1974 until his death in 2004. Yet, due to Swedish inheritance laws, she was not entitled to a single krona.  Instead, Larsson’s father and brother, with whom Eva claims Larsson had little contact, inherited the rights to the books."
I don't blame her for holding out.  They should have offered her a three way split.  This is a perfect example of why people should have wills even if they don't want to think about it.  Considering the death threats he received I'm really surprised he didn't have a will.