Over the course of a nearly four-decade career, Cory Doctorow has written 15 novels, four graphic novels, dozens of short stories, six nonfiction books, approximately 60,000 blog posts and thousands of essays.

And yet for all the millions of words he’s published, these days the award-winning science fiction author and veteran internet activist is best known for just a single one: Enshittification.

The term, which Doctorow, 54, popularized in essays in 2022 and 2023, refers to the way that online platforms become worse to use over time, as the corporations that own them try to make more money. Though the coinage is cheeky, in Doctorow’s telling the phenomenon it describes is a specific, nearly scientific process that progresses according to discrete stages, like a disease.

Since then, the meaning has expanded to encompass a general vibe — a feeling far greater than frustration at Facebook, which long ago ceased being a good way to connect with friends, or Google, whose search is now baggy with SEO spam. Of late, the idea has been employed to describe everything from video games to television to American democracy itself.

“It’s frustrating. It’s demoralizing. It’s even terrifying,” Doctorow said in a 2024 speech.

On Tuesday, Farrar Straus & Giroux will release “Enshittification: Why Everything Suddenly Got Worse and What to Do About It,” Doctorow’s book-length elaboration on his essays, complete with case studies (Uber, Twitter, Photoshop) and his prescriptions for change, which revolve around breaking up big tech companies and regulating them more robustly.

Still, given the thousands of words Doctorow has already, characteristically, written on the subject, the question arises: Why write a book at all?