Step Into the Story

Every January 1st for the last decade, one more Agatha Christie novel has quietly stopped belonging to anyone in particular — at least in the United States. On January 1, 2027, it's The Sittaford Mystery's turn.

The premise alone earns its place in the canon: a snowbound house party on Dartmoor, a parlor game with a talking board, and a message that names a man's death an hour before anyone could have known he was dead. Christie published it in 1931 — the same year, as it happens, that a 95-year U.S. copyright clock started ticking on it without anyone involved having the faintest idea that clock existed.

Why 2027, specifically

Books published in the U.S. before 1978 get a maximum copyright term of 95 years from publication, under a chain of laws running from the 1909 Copyright Act through the 1998 Sonny Bono extension. Do the arithmetic on 1931 and you land on January 1, 2027 — the date the term runs out and the book enters the public domain.

This isn't a one-time event; it's a schedule Christie fans have been watching for years. The Mysterious Affair at Styles (1920) went first, back in 2016. Then The Murder of Roger Ackroyd (2022), The Big Four (2023), The Mystery of the Blue Train (2024), The Seven Dials Mystery (2025), and The Murder at the Vicarage — Miss Marple's debut — this past January. The Sittaford Mystery is simply next in line.

One caveat worth being precise about: this is a U.S. copyright quirk, tied to that country's pre-1978 term rules. In the UK and most of Europe, copyright runs for the author's life plus 70 years — which means Christie's work there stays protected until 2046, regardless of what happens on Gutenberg or in the U.S. public domain calendar.

Will it actually show up on Project Gutenberg?

We checked. As of today, Project Gutenberg already hosts seventeen Christie titles, including The Murder at the Vicarage, added earlier this year right on schedule. The Sittaford Mystery isn't listed yet — which is exactly what you'd expect for a book that isn't legally free until January 1. Given how promptly Gutenberg's volunteers have processed every Christie title before it, we hope we can find her works there once the date arrives — but until it's actually posted, that's a hope, not a confirmation.

Why a mystery-case business cares about a 96-year-old copyright date

Because the appetite this book taps into is the same one we build for: a closed circle of suspects, a household with something to hide, and a solution that only holds up once every clue is actually accounted for. The Sittaford Mystery earns its reputation the honest way — Christie plants a genuine séance-table prediction and then makes you prove, evidence in hand, whether it was a trick or a warning.

If you're planning to spend January curled up with a free copy of Christie's Dartmoor snowstorm, consider it a warm-up. The instinct it exercises — treat every alibi as a claim, not a fact, until the paper trail backs it up — is exactly what our own printable cases ask of you.

If it is the free end of the genre you are after more broadly, we keep an honest list of what you can legally get for nothing — and what a paid case actually costs to make — in our guide to free murder mystery games.