Watermarking an advance copy is a modest, achievable goal dressed up as a security measure. It will not stop anyone copying your book. What it does is tell you whose copy ended up in circulation, which lets you stop supplying that person and understand how your material moves. That is worth something, provided you understand it's all you are buying.
The approaches
| Method | Traceable | Friction |
|---|---|---|
| Recipient name on each page | Yes, obviously | High; irritating to read |
| Name in the front matter only | Yes, and easily removed | Low |
| Per-copy invisible marking | Yes, if implemented well | None to the reader |
| Unique file metadata | Partly; metadata is easily stripped | None |
| Distribution service tracking | Varies by service | None |
| No watermark | No | None |
The third row is the arrangement most authors want: something that identifies the copy without the reader noticing. Several distribution services provide it, which is the practical route for most people.
The trade with reviewers
The people receiving advance copies are doing you a favour, often unpaid, and heavy-handed protection reads as suspicion. A name stamped across every page makes the book unpleasant to read, which reduces the number who finish it, which was the point of sending it. Invisible is better than visible for the relationship as well as the reading.
What to do alongside
- Keep a record of who received what and when.
- Use a distribution service rather than emailing files, so the record exists.
- Send the version you're prepared to have leak, which for an advance copy is fine.
- Set expectations politely in the covering message.
- Accept that some copies will circulate.
Point five is the realistic posture. Advance copies leak; the goal is knowing which channel, not preventing it.
Identifying a leaked copy
When a file surfaces, it is identified by whatever made the copies different when you sent them, so most of this work was done or not done months earlier.
Start with the distribution service. If it applied per-copy marking, it will have a means of decoding a returned file, and its support team is the fastest route. Send them the file itself rather than a screenshot of it.
Then check the obvious carriers in order. The front matter, where a recipient name usually sits. The file metadata, including the title, author, publisher and unique identifier fields, which some systems vary per copy. And the file name, which people rename far less often than you would expect.
Match whatever you find against your own record of who received what and when. Without that record none of it resolves to a person, which is why the record is worth more than the marking.
If every recipient got an identical unmarked file, the copy cannot be traced and it's better to accept that than to guess at a reviewer. Note the date it appeared, which narrows the source to the rounds sent before it, and mark the next round.
A practical next step
Use a distribution service for your next advance round, so that you have a record of who received the book. That record is most of the value.
Sources checked
Frequently asked questions
What does watermarking achieve?
Attribution. It tells you which recipient's copy leaked, which lets you close that channel. It does not prevent copying.
Does it deter leaks?
Mildly, and mainly the casual kind. Someone determined to leak a book can defeat any watermark.
Is it worth the friction?
Usually yes, if it is invisible to the reader. A visible watermark on every page annoys the reviewers you want.