The novel takes place on Soldier Island, a remote and isolated location that sets the stage for the mysterious murders.

Sherlock Holmes is the brilliant detective known for his sharp intellect and deductive reasoning skills.

The Priory of Sion is the secret society that holds the key to the mystery surrounding the Holy Grail and the true identity of Jesus Christ.

The Millennium Series, written by Stieg Larsson, follows the adventures of Lisbeth Salander and Mikael Blomkvist as they investigate various crimes and conspiracies.

Amy Dunne is the wife of Nick Dunne and the central figure in the novel, whose disappearance sets off a chain of events that unravels their marriage and exposes dark secrets.

Lee Child is the author of the Jack Reacher series, which follows the adventures of the nomadic former military policeman as he investigates various crimes and injustices.

Dartmoor is the setting for the novel, where Sherlock Holmes and Dr. Watson investigate the legend of the Hound of the Baskervilles, a spectral hound that is said to haunt the moor and kill members of the Baskerville family.

Jessica Fletcher is the main character in the Murder, She Wrote series, which follows her as she uses her writing skills and keen observation to solve crimes in her fictional town of Cabot Cove, Maine.

Rachel Watson is the protagonist of the novel, a woman struggling with alcoholism and a recent divorce who becomes fixated on the lives of Megan and Scott Hipwell, a couple she sees on her daily train commute.

Jo Nesbø is the author of the Harry Hole series, which follows the detective as he investigates various crimes and conspiracies in Oslo, Norway.

Theo Faber is the protagonist of the novel, a psychotherapist who becomes obsessed with helping Alicia Berenson, a patient who has been selectively mute since murdering her husband six years earlier.

Stieg Larsson is the author of the Millennium Series, which follows the adventures of Lisbeth Salander and Mikael Blomkvist as they investigate various crimes and conspiracies.

Anna Fox is the protagonist of the novel, an agoraphobic woman who becomes convinced that she witnessed a crime in the house across the street from her window.

Lee Child is the author of the Jack Reacher series, which follows the adventures of the nomadic former military policeman as he investigates various crimes and injustices.

Inishmore is the remote island where the wedding takes place and where the guests start dying mysteriously, creating a tense and suspenseful atmosphere.