Post Mortem: A Mystery

by David Lagercrantz

From the bestselling writer of The Girl in the Spider's Web comes another mystery led by detective duo Rekke and this time, their hunt for a serial killer has a literary twist.

It’s 1988. Dag and his friend Pompe are on a road trip through Europe. As they speed through French towns and Basque villages in Dag’s red BMW convertible, they party and discuss Celine, Hemingway, and Leonard Cohen. But when Pompe's drinking gets more intense, a darker side emerges. In the Spanish port city of Santander, Pompe and Dag meet a young waitress, Sandra. She has dreams of becoming a writer and is smitten by the two intellectual Scandinavians, especially Pompe, who represents the literary lifestyle she longs for. Before Dag goes home to Sweden, he decides to tell Sandra what Pompe might be capable of...

Now it's November 2008, back in Stockholm. We’re reintroduced to Professor Hans Rekke and his detective partner Micaela Vargas, who has a new boyfriend she hasn't yet told Rekke about. They receive a surprise visit from a Spanish police chief inspector who is haunted by the unsolved, brutal murder of a young woman in Santander in the late ‘80s, and believes this case is connected to others. Could there be a serial killer on the loose, who leaves numerical codes on the bodies of his victims? Can Rekke help decipher these signs before the killer strikes again?

Post Mortem switches between these two timelines, taking us into the last day of Sandra’s life, and Rekke and Vargas’s search for clues, which lead them by turns to an egomaniac writer, a widely loathed literary agent, and ultimately to Sandra's posthumously published short story. In yet another intricate and exciting puzzle mystery, David Lagercrantz draws on the literary world that he—and we—know all too well to tell a story about guilt, shame, repressed memories, human depravity, and publishing.

Kindle Edition

Expected publication August 25, 2026

About the author

David Lagercrantz, born in 1962, is a journalist and author, living in Stockholm. His first book was published in 1997, a biography of the Swedish adventurer and mountaineer Göran Kropp. In 2000 his biography on the inventor Håkan Lans, A Swedish Genious, was published. His breakthrough as a novelist was Fall of Man in Wilmslow, a fictionalised novel about the British mathematician Alan Turing. In David Lagercrantz' writing you can often see a pattern: major talents who refuse to follow convention. He has been interested not only in what it takes to stand out from the crowd, but also in the resistance that such creativity inevitably faces.

In 2011 his best-selling sports biography I am Zlatan Ibrahimović was published, one of the most successful books in Sweden in modern times. The biography was nominated for the prestigious August Prize in 2012, as well as shortlisted for the William Hill Sports Book of the Year award. To date, the book has been published in over 30 languages around the world and been sold in millions of copies.

In the summer of 2013, Lagercrantz was asked by Moggliden (the Larsson Estate) and Norstedts to write the fourth, free-standing sequel to Stieg Larsson's Millennium Trilogy. The Girl in the Spider's Web was published – in August 27, 2015 – simultaneously by 26 publishers (in 24 languages) worldwide, ten years after the Swedish publication of Stieg Larsson's The Girl With the Dragon Tattoo.

Stieg Larsson's three Millennium novels have sold more than 82 Million copies to date, by 52 publishers worldwide. The Girl in the Spider's Web is sold to 47 publishers and more than 6 Million copies have been sold worldwide.