There is a law in this country that says every UK-published book must be sent, free of charge, to the British Library. Most British indie authors have never heard of it. The ones who have heard of it tend to assume it doesn't apply to them, because surely it can't, surely a thing you typed into Vellum at the kitchen table doesn't count as "publishing" in the eyes of a 300-year-old institution.
It does. The Legal Deposit Libraries Act 2003 has been quietly sitting in the corner of British publishing for over twenty years, waving politely at self-published authors as they wander past in their dressing gowns. And while enforcement against individual indies is, in practice, somewhere between rare and non-existent, the obligation is real, the libraries do notice, and there is an upside to playing along that almost no one mentions.
What legal deposit actually is
Legal deposit is the requirement that publishers send a copy of every published work to certain national libraries so that a complete archive of the country's published output is preserved. The British scheme is one of the oldest in the world, dating back in some form to 1662.
The current framework is the Legal Deposit Libraries Act 2003, which covers print works, and the Legal Deposit Libraries (Non-Print Works) Regulations 2013, which extended the scheme to ebooks and certain UK websites. Together these mean that if you publish a book in the United Kingdom — print or digital, fiction or non-fiction — you are technically obliged to deposit a copy.
The six libraries
There are six legal deposit libraries in the UK and Ireland:
- The British Library (London).
- The Bodleian Libraries (Oxford).
- Cambridge University Library.
- The National Library of Scotland (Edinburgh).
- The National Library of Wales (Aberystwyth).
- The Library of Trinity College Dublin.
The British Library gets a copy automatically and unconditionally for every print title published in the UK. The other five are entitled to a copy on request, which means they don't always ask, but they can. The administrative front desk for those five is the Agency for the Legal Deposit Libraries, abbreviated ALDL, based in Edinburgh. ALDL writes to publishers, requests copies on behalf of the five libraries, and forwards them on. If you ever get an email or letter from ALDL asking for copies of your books, that's why.
What you actually have to send, and when
For a print book, the obligation is one copy of the best available edition, sent to the British Library within one month of publication. The address — for the avoidance of any creative interpretation — is on the British Library's legal deposit page, which is the most up-to-date source. The book must be the actual published edition, not a galley or proof, and you don't include an invoice because nobody is paying you. This is the part that surprises some authors. You print it, you box it up, you pay the postage, and you send it in. The reward is a slightly fuzzy feeling and the knowledge that a copy of your book will outlive you, your publisher, and probably the building it's stored in.
The other five libraries, via ALDL, can request a copy within twelve months. In practice they often do, particularly for fiction with an ISBN. So a sensible default is to assume you'll be sending one to the British Library and one to ALDL, which then distributes to the other five — except you only physically post the one ALDL parcel. ALDL handles the onward bit.
Does this apply to self-publishers?
Yes. This is the bit indie authors regularly try to argue their way out of, and the answer doesn't change. The Act applies to anyone publishing in the UK. It does not include a "but only if you have a proper publisher with an office in Bloomsbury" clause. If you are a UK resident self-publishing under your own name or your own imprint, the obligation is yours.
The British Library's own guidance is unambiguous on this. They explicitly include self-publishers in their definition of who must deposit. They also publish a helpful FAQ that quietly admits enforcement is patchy, but the obligation exists whether they chase you or not.
The KDP-only awkwardness
This is where the picture gets murkier and where most indie authors get stuck. If you publish exclusively through Amazon KDP, you might wonder who the legal "publisher" actually is — you, or Amazon. The honest answer is: it depends on how the book is presented, and the law is fuzzier here than anyone would like.
The pragmatic position taken by most indie authors and the British Library itself runs roughly like this:
- If your book lists you (or your own imprint) as the publisher on the copyright page, you are the publisher for legal deposit purposes, and the obligation is yours.
- If your book lists "Independently Published" — the placeholder Amazon uses when you don't supply your own imprint — the situation is genuinely ambiguous, and the British Library tends to treat the author as responsible.
- If you have your own ISBN block from Nielsen and your own imprint name, you are categorically the publisher and there's no wriggle room.
In other words, the more professional your indie set-up looks, the more clearly the obligation falls on you. If you've followed the advice from the earlier post on ISBNs and bought your own block, congratulations, you are a publisher in the eyes of the law. Send the books.
Ebooks and digital legal deposit
The 2013 regulations extended legal deposit to non-print works. In theory this means your ebook is also subject to deposit. In practice, the British Library handles ebook legal deposit through harvesting agreements with major retailers and aggregators rather than asking individual authors to upload EPUB files. The system runs in the background; KDP, Kobo Writing Life, and the major aggregators feed metadata and content to the BL's digital deposit infrastructure. You don't have to do anything for ebooks.
This is one of the few corners of indie publishing where doing nothing is the correct response. Treasure it.
What happens if you don't deposit
The Act allows for a fine of up to £500 per non-deposited title, in theory. In practice, the British Library does not currently pursue individual self-publishers through the courts for non-deposit. They send polite letters. They follow up. They occasionally publish lists of "thank you" acknowledgements when authors finally cough up. The threat of the £500 fine is the legal stick that almost never gets swung.
That said, "rarely enforced" is not the same as "fictional." The obligation exists. If a determined library system decided to start chasing UK-resident indie authors who'd ignored years of requests from ALDL, the law is on their side. Most of us are quietly relying on continued institutional politeness.
The unexpected upside
Here's the bit that doesn't get mentioned enough. Once your book is in the British Library's catalogue, it has a permanent record in the national bibliography. It shows up in searches by researchers, students, journalists, and the kind of person who reads the BL's online catalogue for fun. It's findable in a way that an Amazon listing isn't, because Amazon listings vanish when Amazon decides they should.
It's also useful for legitimacy. If anyone ever asks whether you're a "real" published author, the British Library's catalogue is a reasonable place to point them. It costs you the price of one paperback and a Royal Mail second-class large letter.
The five-step version
- When you publish, set a calendar reminder for one month later. That's your deposit deadline for the British Library copy.
- Buy one copy of your own book at author cost via KDP. Print only — the BL doesn't want a Kindle file from you.
- Wrap it sensibly and post it to the British Library's legal deposit address (always check the current address on the BL website — do not trust an address from a forum post).
- If you receive a letter or email from ALDL in Edinburgh requesting copies for the other five libraries, send one copy to the ALDL address they give you. They handle the onward distribution.
- Keep a record. A simple spreadsheet line per title showing date posted and recipient. If anyone ever asks, you've got proof of compliance, and you've also given yourself a useful inventory of your own catalogue.
That's it. Half an afternoon, two paperbacks out the door, and a small but genuine contribution to the national archive of British literature. Not a bad way to spend a launch week.
If you'd like the legal deposit step to live in a sensible place rather than as a sticky note that falls off your monitor on day three, the WIPsage book launch tool bakes things like this into your launch checklist alongside the metadata, the ISBN admin, and the post-launch quick wins. The BL doesn't send reminders. WIPsage will.