The Stranger Diaries

Set in contemporary West Sussex, the novel weaves together a Victorian gothic short story, a modern murder investigation, and the private diaries of an English teacher to create a mystery told from three alternating perspectives.

Clare Cassidy teaches English at Talgarth High, a secondary school housed partly in Holland House, the former home of Victorian writer R.M. Holland. Holland is best known for "The Stranger," a gothic short story about a Cambridge initiation ritual that ends in murder, punctuated by the recurring phrase "Hell is empty." Clare is writing a biography of Holland and is fascinated by his reclusive life, the mysterious death of his wife Alice, and his possibly illegitimate daughter, Mariana. During a half-term creative writing course, Clare teaches "The Stranger" to adult students. That same day, she learns from Rick Lewis, her head of department, that their colleague and close friend, Ella Elphick, has been murdered in her home.

Detective Sergeant (DS) Harbinder Kaur and DS Neil Winston visit Clare at home. Harbinder tells Clare that most murder victims are killed by someone they know and asks about Ella's boyfriends. Clare mentions a former boyfriend named Bradley but deliberately conceals the fact that Rick had a brief affair with Ella over the summer during a training course in Hythe. Clare's omission stems from her own complicated feelings: Rick had first pursued Clare obsessively, sitting outside her house for hours and declaring himself "ill" with love for her, before turning to Ella when Clare rejected him.

Separately, Clare receives a letter from Henry Hamilton, a Senior Lecturer in English at Cambridge, who has found letters written by R.M. Holland. She takes her 15-year-old daughter, Georgia, to visit him. The Holland letters, addressed to Holland's old friend William Petherick, mention a daughter named Mariana, describe her as inheriting "her mother's taint," and reference an unpublished novel called The Ravening Beast. Clare and Henry discuss Holland's marriage to the actress Alice Avery, who likely died from a fall at Holland House, and the mysterious absence of Mariana from any family records.

Back at school after half-term, Harbinder and Neil interview Clare again, revealing they have read Ella's encrypted social media messages referencing "Doctor Jekyll and Mr Hythe" and "C knows." Clare denies knowing what happened. Neil reveals that a Post-it note reading "Hell is empty" was found beside Ella's body, a quote from both Shakespeare's The Tempest and Holland's "The Stranger." While reviewing her diary, Clare discovers something chilling: tiny italic handwriting at the bottom of a page, not her own, reading "HALLO, CLARE. YOU DON'T KNOW ME."

The narrative shifts to Harbinder's perspective. A 35-year-old Sikh woman who is secretly gay and still lives with her parents, Harbinder is a former Talgarth High student, sharp and skeptical of Clare from the start. She describes the crime scene: Ella had stab wounds to the neck and chest, post-mortem wounds on her palms resembling the stigmata (the wounds associated with Christ's crucifixion), and the "Hell is empty" note showed traces of a plastic coating from a freezer bag. When told about Ella's death, Rick immediately asks if something has happened to Clare, which Harbinder finds revealing. Through her old school friend Gary Carter, now a geography teacher at Talgarth, Harbinder learns that Rick stalked Clare for months and that gossip about Rick and Ella is widespread.

On Halloween night, Clare discovers a shop-window dummy dressed in Victorian clothes seated at Holland's desk in the attic study. She calls Harbinder and shows her the diary inscription. Harbinder recognizes the handwriting as matching the "Hell is empty" note, connecting the diary writer directly to Ella's murder.

Part Three introduces Georgia's perspective. Georgia is an aspiring writer who attends a creative writing group led by Bryony Hughes, a teacher at the local sixth-form college, whom Georgia and her friends believe to be a white witch, a practitioner of benevolent magic. Georgia's close friends, Patrick O'Leary, Natasha White, and Venetia Sherbourne, form a tight circle under Bryony's mentorship. Bryony has given each of them a black obsidian stone for protection. Georgia posts diary entries on MySecretDiary.com, an online creative writing forum. Her boyfriend, Ty, who is 21 and works at a local pub, insists on waiting until Georgia turns 16 before they have sex.

At Ella's funeral, Patrick confesses to Georgia that on the night of the murder, he went to Ella's house on Bryony's advice to apologize about the valentine card. He did not see Ella but saw Rick Lewis leaving her house. A second entry then appears in Clare's diary in the same italic hand, opening with a passage from the villain Count Fosco in Wilkie Collins's The Woman in White and declaring: "I have already disposed of one of these creatures. I will fall on the others like a ravening beast." Harbinder arranges police protection for Clare and Georgia.

On their first date, Clare and Henry visit Holland's study after dinner and discover Rick dead at the desk with a knife in his chest. Investigators determine Rick was lured to the school by a phone call, strangled with wire in a classroom, then carried upstairs and posed at the desk. Another "Hell is empty" note is found in a freezer bag, along with candles, dried herbs, and a black obsidian stone.

Clare's dog, Herbert, goes missing and is found locked in a room in the derelict cement factory behind Clare's house. The room contains a sleeping bag, camping stove, and a copy of The Tempest, revealing that someone has been squatting there and watching Clare's house through a window. DNA from the sleeping bag matches DNA found on Rick's body, confirming the factory occupant is the killer.

Clare's ex-husband, Simon Newton, is then stabbed outside his London office but survives when passers-by intervene. A new entry appears in Clare's diary beneath her written frustrations about Simon: "Leave it to me." Harbinder sends Clare and Georgia by sleeper train to Clare's grandmother's house in Ullapool, a remote village in the Scottish Highlands. That night, Harbinder searches Georgia's bedroom and finds printed pages from MySecretDiary.com: a graphic murder story posted by someone called "Mariana," referencing "a ravening beast." Georgia's fingerprints match those on the obsidian stone at Rick's crime scene, but Georgia has solid alibis for both attacks.

The breakthrough comes when Harbinder examines a postcard on Georgia's pinboard signed "Just a note to say I love you" and recognizes the italic handwriting as the same script from the "Hell is empty" notes and Clare's diary entries. The card was sent by Ty. Harbinder flies to Inverness and races to Ullapool, arriving as Ty breaks into the grandmother's house. He traps Clare and her grandmother downstairs and corners Georgia in the attic. Herbert attacks Ty before Harbinder and a Scottish sergeant burst in and subdue him. Harbinder arrests Ty for the murders of Ella and Rick and the attempted murders of Simon and Georgia.

Ty confesses fully. He first saw Clare at the Hythe training course where he worked as a barman, used a pass key to enter her hotel room, and read her diary, becoming obsessed with protecting her. He followed Clare to Sussex, became Georgia's boyfriend to get closer to Clare, and squatted in the factory to monitor her diaries. He killed Ella because Clare wrote that Ella upset her; he killed Rick because Clare wrote that she hated him; he attacked Simon because Clare wrote that her life went wrong the day she met him. He planned to kill Georgia so he and Clare could "start again." He modeled the murders on "The Stranger," which he found in Georgia's room, and used candles, herbs, and the obsidian stone taken from Georgia's belongings.

In an epilogue set during the Christmas holidays, Clare, Georgia, and Harbinder visit Holland's attic study one last time. Georgia solves the mystery of Mariana by pointing to a small white dog in a photograph captioned "With Mariana." Mariana was not Holland's daughter but his dog, and "her mother's taint" referred to an inherited curly tail. The poem "For M. RIP" mourned a beloved pet, not a lost child.