Harriet from The Traitors is crime novelist Harriet Tyce, and she has four published thrillers so far, with a fifth on the way.

Main books she’s written

Here are the books Harriet Tyce (the Harriet on The Traitors) has written or has announced:

  • Blood Orange (2019) – Her debut psychological crime thriller, a Sunday Times bestseller and a Richard & Judy Book Club pick.
  • The Lies You Told (2020) – Another London-set psychological thriller following a barrister rebuilding her life, also a Sunday Times bestseller.
  • It Ends at Midnight (2022/2023 listing) – A dark New Year’s Eve party thriller set in Edinburgh, again a Sunday Times bestseller.
  • A Lesson in Cruelty (2024) – A twisty thriller about three women and a web of lies surrounding a dead body, which hit both Kindle and Sunday Times bestseller lists.
  • Witch Trial (due Feb 2026) – A forthcoming novel about two teenage girls charged with murdering their best friend amid a social‑media‑fuelled witch hunt; it’s announced for publication in late February 2026 and is already available to pre‑order.

Quick Scoop angle

  • She’s not just “Harriet from The Traitors” – she was already a million‑copy‑selling crime author before appearing on Series 4.
  • Her Traitors stint in early 2026 has sent her backlist soaring, with reports of a big spike in sales since the show aired.

In other words, if you’re googling “what books has Harriet from Traitors written”, you’re looking for Harriet Tyce’s psychological thrillers Blood Orange, The Lies You Told, It Ends at Midnight, A Lesson in Cruelty – plus the upcoming Witch Trial.

Information gathered from public forums or data available on the internet and portrayed here.