Subprime Attention Crisis by Tim Hwang
Last updated: 3 October 2026
Subprime Attention Crisis by Tim Hwang argues that online advertising, which pays for most of the free internet, is overvalued in the same way subprime mortgages were before the 2008 crash. Hwang used to lead global public policy on AI and machine learning at Google. On 3 October 2026 Amazon UK had the 176-page FSG paperback in stock at £11.99.
Buy Subprime Attention Crisis on Amazon UK, £11.99
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What Subprime Attention Crisis argues
Most of the websites and apps you use without paying are funded by adverts. Those adverts are bought and sold in automated auctions that run in the fraction of a second it takes a page to load. Hwang compares this market, known as programmatic advertising, to the market in mortgage-backed bonds before 2008.
His case rests on three points. First, the figures advertisers pay for are unreliable, because fraud and adverts that nobody actually sees inflate them. Second, the automated bidding systems are largely unregulated and hard for buyers to see into. Third, a lot of online advertising works less well than its price suggests.
If advertisers stop trusting the numbers, Hwang argues, the money behind the free internet could fall away quickly. In that case more of the web would end up behind paywalls, open only to people who can afford to pay.
Who Tim Hwang is
Hwang is a writer and researcher based in New York. He directed the Harvard-MIT Ethics and Governance of AI Initiative and was Google's global public policy lead for AI and machine learning. His writing has appeared in The New York Times, The Washington Post, Wired and The Atlantic.
The book came out in October 2020 in FSG Originals x Logic, a series of short books from the American publisher Farrar, Straus and Giroux and Logic magazine. The publisher's description is on Macmillan's page for Subprime Attention Crisis.
Key facts
- Author: Tim Hwang
- Publisher: FSG (Farrar, Straus and Giroux)
- This edition: paperback, 13 October 2020
- Length: 176 pages, 13 x 19cm, the size of a standard paperback novel
- Other formats: Kindle ebook and audiobook
- ISBN: 9780374538651
- Price: £11.99 on Amazon UK on 3 October 2026
- Amazon rating: 4.1 out of 5 from 194 ratings
Who Subprime Attention Crisis suits
- People who work in marketing or media: it explains where the money goes in online advertising, and why the reported numbers deserve a second look.
- Anyone curious about free apps: it shows how services that charge you nothing pay their bills, and what would change if that money dried up.
- Readers of economics books: if you liked Another Now by Yanis Varoufakis, which imagines a different way of running the economy, this is a shorter read about one market.
The limits
The book is short, at 176 pages, and it makes one argument rather than surveying the whole industry. Hwang's examples are mostly American. It came out in 2020, two years before ChatGPT launched, so it does not cover how AI chatbots and AI search answers have changed where people look for information. The crash it warns about had not happened by October 2026, so treat it as a case for why the ad market is fragile, not a forecast with a date.
Where to buy it in the UK
Amazon UK had the paperback in stock at £11.99 on 3 October 2026. It is also sold as a Kindle ebook and an audiobook.
Subprime Attention Crisis on Amazon UK
FAQs
What is Subprime Attention Crisis about?
It argues that online advertising is overvalued, like subprime mortgages before 2008, and that the free internet it pays for could suffer if that value collapses.
Who wrote Subprime Attention Crisis?
Tim Hwang, a writer and researcher who was Google's global public policy lead for AI and machine learning.
How long is Subprime Attention Crisis?
The FSG paperback runs to 176 pages.
How much does it cost in the UK?
Amazon UK had the paperback at £11.99 on 3 October 2026.
Does the book cover AI?
No. It was published in October 2020, before ChatGPT launched in November 2022, so it deals with display and search advertising as they worked then.
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