The Girl in the Spider's Web (Millennium, #4) by David Lagercrantz

The fourth book in the Millennium Series, written by David Lagercrantz, continues Lisbeth Salander’s story after Stieg Larsson’s original trilogy. Salander, now a world-class hacker, becomes entangled in a dangerous cyber espionage case involving the NSA and artificial intelligence. When journalist Mikael Blomkvist is contacted by a desperate scientist with explosive information, he turns to Salander for help. Meanwhile, Salander is being hunted by a ruthless criminal organization tied to her past. As she navigates a web of spies, government corruption, and cyber warfare, she must confront an even greater personal threat—her long-lost twin sister. This fast-paced thriller combines cutting-edge technology, conspiracy, and Salander’s relentless quest for justice.