The Girl in the Spider’s Web: A Lisbeth Salander novel, continuing Stieg Larsson’s Millennium Series Paperback – by David Lagercrantz (Author) [Little Shop of Stories, paperback]
As it goes, the fourth book in the series. I remember reading that he had worked on the fifth book in the series, and possibly the sixth, before he had died. There was all sorts of controversy and rumor, the girlfriend denies there was any further plans for the series.
At any rate, this was an okay continuation. It’s not as good, and no where near enough of the title character Salander. But there’s an evil twin sister of Salander introduced, and it kind of feels like this was a filler novel before getting to the plot Stieg started for the fifth book.
Basically, as good as one has any reason to suspect.