Where to Find a Complete Enid Blyton Mystery Series List
If you are trying to track down every mystery book Enid Blyton wrote, the first problem you will hit is that there is no single official list she published herself. She wrote across multiple mystery franchises at once, and publishers have reorganized, renamed, and repackaged her backlist so many times that a clean numbered sequence doesn't really exist outside of fan-maintained databases. Here is the core set of series people are actually looking for when they search for one. The Famous Five comes first with twenty-one books, starting with Five on a Trek in 1942 and ending with Five Final Adventure in 1963. The Secret Seven has twelve books from Secret Seven (1949) through Secret Seven On the Trail (1959). The Five Find-Outers have ten books spanning from Five Find-Outers and the Mystery of the Sign Letters in 1943 up to Five Find-Outers and the Mystery of the Carrington Case in 1958. Then there is Malory Towers, which has seven books but is more boarding-school fiction than mystery, though it shows up on these lists anyway. The Noddy mystery titles are less relevant here and usually get filtered out by anyone actually trying to read mysteries in order. The total comes to roughly thirty-three actual mystery novels across the three real mystery series. That number shifts depending on whether you count illustrated abridged editions or the later tie-in books that other authors wrote under Blyton's name after her death. Those don't count as her work and you should avoid them if you want the originals.
I spent a long time trying to build a single ordered list because I wanted to give my younger students a reading sequence. The problem is that within each series the publication order does not match the internal chronological order. Five Find-Outers and the Mystery of the Dissapearing Husband was published fourth but takes place after The Mystery of the Burnt Cottage which came out later. I just accepted that publication order was close enough for a classroom reading list and moved on. If you want strict internal chronology you need to cross-reference fan wikis that track story timelines separately from release dates. The most practical way to get an accurate list is through the Enid Blyton website and the official Enid Blyton estate publications. The estate maintains a bibliography that updates when new editions or discovered manuscripts appear. It is not perfect but it is the closest thing to authoritative. Amazon and Goodreads listings are worse because they conflate original editions, reprints, abridged versions, and ghost-written continuations into the same catalog. Project Gutenberg and standard library catalogs also carry most of the public domain entries. Books published before 1930 in the UK are generally out of copyright in Britain but the rules changed with the 1995 Copyright Term Directive so most of Blyton's work stays under copyright until at least 2043 depending on the territory. You will find free PDFs floating around but they are usually scanned from older editions with poor OCR and missing illustrations.
One thing nobody warns you about is that the book covers and internal titles vary wildly between UK and US editions. Five Find-Outers and the Mystery of the Burnt Cottage was retitled Five Find-Outers and the Case of the Candlewick Suit in some American releases. If you are ordering by title alone you will accidentally buy duplicates or the wrong book. Keep an ISBN when possible or stick to one publisher's edition throughout a series. The main downside to relying on any single list is that Scholastic and Hodder have both released curated box sets that skip books. A "Best of Famous Five" collection might only include seven titles. If your goal is to read the complete series this cuts the experience short without you realizing it until halfway through. Check the spine numbers or the full series numbering on the copyright page before committing to a box set. For a working reference I keep the Wikipedia list as a starting point, then verify against the Enid Blyton Official website bibliography, and finally check WorldCat for library holdings if I need to track down a specific early edition. That three-source check catches the discrepancies before they become a problem. The whole process takes about ten minutes per series and prevents the headache of buying the wrong version twice.