SeriesStack

Secret Detective Agency Books in Order

by Helena DixonMystery, Thriller & Suspense

5 books from The Secret Detective Agency (2025) to The Crossword Murders: A totally unputdownable English cozy murder mystery (2026). Rated 4.5 across 716 listener reviews.

Reading order

  1. The Secret Detective Agency

    Book 1 2025 4.2 (232)

    London, 1941: Miss Jane Treen is at her desk, strong black coffee in hand and fluffy ginger cat by her side, when her top-secret government work is interrupted by an urgent call to Devon

    Kindle Paperback Audiobook

  2. The Seaside Murders

    Book 2 2025 4.5 (136)

    When Jane Treen is summoned to her boss’s office at the end of a long day, she smooths down her tweed skirt and makes them both another strong pot of coffee.

    Kindle Paperback Audiobook

  3. Murder Most British

    Book 3 2025 4.6 (198)

    Big Ben chiming in the distance, chilly walks along the river Thames, cocktails at the Ritz… and a government secretary dead? Only Jane Treen can solve the case!

    Kindle Paperback Audiobook

  4. The Afternoon Tea Murders

    Book 4 2026 4.8 (150)

    London, 1942. Miss Jane Treen is at her desk in Whitehall sipping a strong coffee when she receives an urgent message about her colleague, codebreaker Arthur Cilento.

    Kindle Paperback Audiobook

  5. The Crossword Murders: A totally unputdownable English cozy murder mystery

    Book 5 2026

    A crossword that’s tricky to crack, a hot cup of coffee… and hidden clues? Can Jane Treen work this mystery out?England, 1942.

    Kindle Paperback Audiobook

About this reading order

Books are listed in the series' own numbering, which for Secret Detective Agency is also the best order to read them in. Years are first publication where we could confirm it, and otherwise the first audiobook release.

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