Used Booksellers Are Racking Up Huge Sales. They’re Not Thrilled About the Likely Reason

Over in the U.K. used booksellers are finally making some money, according to a report on Saturday from the BBC . The Beeb spoke to Stuart Manley, founder of the used book store Barter Books—which just judging from this video is my idea of heaven—and Manley told them he made as much a single recent order of used books as he usually makes in a week.

Another bookseller, David Tobin, who runs north London's Walden Books—not to be mistaken for Waldenbooks —said he was also in the midst of a business boom. "In some ways it's very nice to sell some of these titles which haven't been sold for many years," he told the BBC. But he added "it would be sad if they are ultimately destroyed."

Yeah, there's a pretty good chance they're being destroyed.

As 404 Media wrote last month , old books are becoming a premium product because anything published after the adoption of LLMs might have LLM outputs in it, which is bad. Up until about 2022, only humans wrote books. And it's human writing that these companies need in order to train future LLMs.

Anthropic got in big trouble for using illegal copies of books as training data, eventually paying out $1.5 billion to settle a class action lawsuit. Recently unearthed court documents reveal that the company's new plan for ingesting the data in books, codenamed "Project Panama." is nice and legal, but a PR nightmare: Destructive scanning, which means taking a physical copy of a book and scanning it, but destroying the physical copy in the process. Scanning books to train AI falls under the fair use doctrine, a court has found. But Anthropic is obligated to destroy books as well , because only one copy of the book exists before the scan, and only one copy exists after, meaning no piracy is occurring.

Perhaps you've seen a report recently about this practice featuring this grisly video of books having their spines sliced off. That's part of destructive scanning.

But in case you think all of this is a big overreaction, or some kind of naive romanticization of physical books, the booksellers in the BBC's report do note the difference between shredding one of five million copies of the Da Vinci Code , and destroying something of actual value.

As the owner of an Edinburgh bookshop called McNaughtan's, Derek Walker, points out to the BBC, there are even some relatively rare books the destruction of which wouldn't be a huge catastrophe. For instance, Walker notes, "A recent academic text published in only 100 copies, 75 of which are already in libraries, may be very rare on the market — but it is perhaps not such a great loss if one copy is destroyed." However, Walker says he has been known to sell "the only known surviving example of an edition from the 18th century."

Rare technical books that have never even been scanned are a sort of holy grail for competing LLMs, since they remain exactly what they are in movies: dusty old artifacts that contain unique, secret knowledge that's been lost to history. Frontier AI companies seeking to create so-called "superintelligence" will no doubt want this knowledge. And if AI companies really do find, absorb, and destroy such knowledge in pursuit of training data, then I guess by definition we'll never know it happened.

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