Knopf will be publishing three new books in its Millennium series, which launched with Stieg Larsson's The Girl with the Dragon Tattoo. The new titles will be written by bestselling Swedish author Karin Smirnoff, with the first of them set to be released on September 5, 2023.

Smirnoff will be taking over the series from David Lagercrantz, who wrote three titles after the original three by Larsson. (Larsson died in 2004, and his original trilogy was published posthumously with the first book coming out in 2005.)

Knopf executive editor Diana Miller acquired U.S. rights to the new books, which all currently untitled, from U.K. publisher Quercus and Magdalena Hedlund at the Stockholm-based Hedlund Agency.

According to Knopf, Smirnoff, who grew up in a small Swedish town a short drive from where Larsson was raised, has sold over 700,000 copies of her books in her native country. Speaking to the job of continuing the series, Smirnoff said she will aim to "continue to build on Stieg Larsson's core themes, such as violence, abuse of power, and contemporary political currents.”

The Millennium series, which is currently made up of six books, has, Knopf added, sold over 100 million copies worldwide. Knopf published The Girl with the Dragon Tattoo in the U.S. in 2008.