The Girl Who Kicked the Hornet's Nest

This is the third book in Larsson's Millennium Trilogy. The first book in Trilogy (The Girl with the Dragon Tattoo) can be read as a stand alone work. The second and third books, however, form one long story. The Girl Who Kicked the Hornet's Nest picks up exactly where The Girl Who Played with Fire ends. (So, you need to read that book first.)
In TGWKtHN, Lisbeth Salander can no longer go it alone. At start of the book she is badly hurt, confined in a hospital, and has very limited communication with the outside world. She is forced to confront her basic distrust of people and to accept the aid of Mikael Blomkvist, Dragan Armansky, and others in order to avoid being locked up, possibly for life, in a mental institution.
(Avoiding spoilers) TGWKtHN, like Larsson's other books, is a long and meandering story. But, it is far from dull. A decades-long criminal conspiracy run by totally ruthless men must be uncovered and dealt with. Lisbeth's innocence must be proved. And, Lisbeth and Mikael must accomplish the rather important task of staying alive to do so. The story proceeds along several story lines that eventually come together in multiple climaxes involving both action and courtroom drama. The ending is oddly satisfying.
I will say no more. Read all three books.