The Girl in the Spider's Web (original title in Swedish: Det som inte dödar oss, lit. 'That which does not kill us') is the fourth novel in the Millennium series. It focuses on the characters Lisbeth Salander and Mikael Blomkvist. Written by David Lagercrantz, this is the first novel in the series not authored by the series' creator and author of the first three Millennium books, Stieg Larsson, who died of a heart attack in 2004.