Stieg Larsson's Millennium series, featuring the enigmatic hacker Lisbeth Salander, is set in Sweden, a country known for its rich literary tradition and captivating crime fiction.

Jo Nesbø's Harry Hole series revolves around the life and investigations of Harry Hole, a brilliant but troubled detective in the Oslo Police Department, known for his tenacity and complex character.

Donna Leon's Commissario Brunetti series is set in the picturesque city of Venice, Italy, where Commissario Guido Brunetti navigates the intricate canals and hidden secrets of the city.

John le Carré's work, particularly his spy novels, is renowned for its intricate plotting, exploration of moral dilemmas, and realistic portrayal of the world of espionage.

Ian Rankin's Inspector Rebus series features the enigmatic and troubled detective John Rebus, who investigates crimes in the gritty and atmospheric city of Edinburgh, Scotland.

Henning Mankell's Kurt Wallander series is set in the fictional town of Ystad, Sweden, where Inspector Kurt Wallander investigates crimes that often reflect the social and political issues of the region.

Peter May's work, particularly his Lewis trilogy, is known for its exploration of the dark side of human nature, themes of guilt and redemption, and atmospheric settings in the Scottish Highlands.

Val McDermid's Tony Hill and Carol Jordan series features the partnership between clinical psychologist Tony Hill and DCI Carol Jordan as they investigate complex and disturbing crimes.

Ann Cleeves' Vera Stanhope series is set in the rugged and atmospheric landscapes of Northumberland, England, where DCI Vera Stanhope investigates crimes that often reveal the hidden secrets of the region.

Louise Penny's work, particularly her Chief Inspector Gamache series, is known for its strong female protagonists, exploration of social issues, and atmospheric settings in the Canadian province of Quebec.

Camilla Läckberg's Fjällbacka series features the partnership between writer Erica Falck and police detective Patrik Hedström as they investigate crimes in the picturesque coastal town of Fjällbacka, Sweden.

Yrsa Sigurðardóttir's Thóra Gudmundsdóttir series is set in the remote and atmospheric landscapes of Iceland, where lawyer Thóra Gudmundsdóttir investigates crimes that often involve ancient Icelandic legends and folklore.

Arnaldur Indriðason's work, particularly his Inspector Erlendur series, often explores the intersection of crime and politics, delving into the dark secrets and power struggles within Icelandic society.

Jussi Adler-Olsen's Department Q series features the enigmatic and troubled detective Carl Mørck, who leads a special department tasked with investigating cold cases in Copenhagen, Denmark.

Stieg Larsson's Millennium series, featuring the enigmatic hacker Lisbeth Salander, is primarily set in Stockholm, Sweden, a city known for its vibrant culture and rich history.