David Lagercrantz was born in 1962, and is an acclaimed author and journalist. In 2015 The Girl in the Spider's Web (2015), his continuation of Stieg Larsson's Millennium Trilogy, became a worldwide bestseller and was made into a film by Sony Pictures (2018). He is the author of the acclaimed and bestselling I am Zlatan Ibrahimovic, Fall of Man in Wilmslow, and the fifth and sixth books in the Millennium series, The Girl Who Takes an Eye for an Eye (2017) and The Girl Who Lived Twice (2019). Dark Music, the first Rekke and Vargas Investigation, will be published in the UK in 2022.

George Goulding was born in Stockholm, educated in England, and spent his legal career working for a London-based law firm. He is now a translator of Swedish literature into English, including David Lagercrantz's continuations of the Millennium trilogy by Stieg Larsson.