A work is in the public domain when its copyright has expired or never applied. Nobody owns it. You can read it, copy it, translate it, adapt it or sell your own edition — without permission and without paying anyone.
When copyright ends
It varies by country, which is the part that trips people up. A common term is the author's life plus 70 years; some countries use life plus 50. Older works may follow different rules depending on when and where they were published.
The practical consequence: a book can be free in one country and still protected in another. Sites that host public-domain texts usually state which jurisdiction they operate under, and that's the thing to check.
"Old" doesn't mean free, and "free to read somewhere" doesn't mean public domain. Check the source, not the vibe.
What's actually in there
Far more than school reading lists. Most nineteenth-century fiction. Foundational horror — Frankenstein, Dracula, Poe. The birth of detective fiction with Sherlock Holmes. Austen, the Brontës, Dostoevsky, Tolstoy, Wilde. Early science fiction from Verne and Wells. Enormous amounts of poetry, philosophy and folklore, in many languages.
What it isn't
A modern translation may still be copyrighted even when the original isn't — the translator did new creative work. The same applies to a specific edition's introduction, notes or cover. And "free to read online" often means licensed or pirated rather than public domain; the two get confused constantly.
Why it matters beyond price
Public domain is what lets culture be rebuilt. Every retelling, adaptation and remix of an old story exists because nobody could say no. It's also the most level part of publishing: a reader with no money and a reader with plenty have identical access.
Where to get them
Long-running digital archives, library apps, and reading apps that include classics. We covered the practical routes in where to read free public-domain classics and the broader money question in how to read more without buying books.
Arwy carries public-domain classics alongside original serialised work, and connects you with other people currently reading them — which turns a two-hundred-year-old novel into something with company in it.
Read the classics free, with other people in them. Try Arwy.