Stieg Larsson's loved ones fight for his legacy

Stieg Larsson, the author behind "The Girl With the Dragon Tattoo" trilogy, died in 2004, but his series lives on in a new book titled "The Girl in the Spider's Web," to be published Tuesday.

Larsson's original story garnered widespread acclaim and was eventually optioned into a $232 million grossing movie. The new author chosen to continue the story is David Lagercrantz.

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And while early reviews seem to be happy with the book, the one person who was closest to Larsson is not.

"I read original writers, not people who copy other people's books, so to say. So I won't read it," said Eva Gabrielsson, Larsson's longtime partner and an author herself. Gabrielsson never married Larsson, which means she doesn't have any right to his estate under Swedish law.

Instead Larsson's brother and father got control of his estate. It was their decision to let Lagercrantz continue the story of the girl with the dragon tattoo.

Gabrielsson sees the latest book as just another slight to the principles Larsson — a political and social activist — so cherished. She also sees it as a simple money grab.

Lagercrantz doesn't see it that way. Though he has never been the political activist that Larsson was, he says he has demons of his own.

And it's not like he doesn't have his own literary chops. He is the author of a biography, and novel about pioneering British computer scientist Alan Turing. Lagercrantz also ghost wrote a memoir for Swedish soccer star Zlatan Ibrahimovic.

WATCH: 'Girl with the Dragon Tattoo' sequel raises controversy:

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