Secret Detective Agency Books in Order
Secret Detective Agency by Helena Dixon contains 5 books, published between 2025 and 2026. The first book is The Secret Detective Agency (2025) and the newest is The Crossword Murders (2026). Publication order is the reading order below.
- Books
- 5
- Published
- 2025–2026
- Confirmed
- 4 of 5 titles
The Secret Detective Agency is a murder mystery series by Helena Dixon, started in 2025. Five books have appeared across two years: The Secret Detective Agency (2025), The Seaside Murders (2025), Murder Most British (2025), The Afternoon Tea Murders (2026) and The Crossword Murders (2026). Dixon continues the series, and no separate chronological ordering has been catalogued, so publication order is the reading order.
How many Secret Detective Agency books are there?
Secret Detective Agency has 5 books, released between 2025 and 2026.
Secret Detective Agency Books in Publication Order
The table lists all 5 Secret Detective Agency books in the order they were published, with the release year and how many independent book listings confirm each title. Catalogue data as of September 2026.
- 1The Secret Detective Agency2025 · confirmed 3/42025–3/4
- 2The Seaside Murders2025 · confirmed 3/42025–3/4
- 3Murder Most British2025 · confirmed 3/42025–3/4
- 4The Afternoon Tea Murders2026 · confirmed 3/42026–3/4
- 5The Crossword Murders2026 · confirmed 2/42026–2/4
Is there a chronological order for Secret Detective Agency?
No separate chronological order is on record for Secret Detective Agency, because none of the book listings this catalogue draws on publishes one; the publication order above is the only order given.
Do you have to read Secret Detective Agency books in order?
You should read the Secret Detective Agency books in publication order, the order of the numbered table above. The catalogue does not record whether each Secret Detective Agency book also stands alone.
Where to start with Secret Detective Agency
Start with The Secret Detective Agency (2025), the earliest published title.
What is the newest Secret Detective Agency book?
The Crossword Murders (2026) is the newest Secret Detective Agency book released so far.
Is there a new Secret Detective Agency book coming?
No next Secret Detective Agency book is announced in the catalogue, which is a gap in the listings it merges rather than a sign that the run has ended.
Secret Detective Agency at a glance
- Still running
- Secret Detective Agency is still running, with a title published as recently as 2026.
- Release pace
- Secret Detective Agency books have appeared more than one a year on average.
- Busiest decade
- Most Secret Detective Agency books, 5 of 5, were published in the 2020s.
More books by Helena Dixon
The author page linked below lists every book in publication order.
- Helena Dixon books in order 30 books